mirror of https://github.com/apache/nifi.git
simonbence
GitHub
parent
bd265bd508
commit
73363d9aea
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@ -0,0 +1,344 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.nifi.processors.hadoop;
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import com.google.common.base.Throwables;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.CreateFlag;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.fs.permission.FsCreateModes;
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import org.apache.hadoop.fs.permission.FsPermission;
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import org.apache.hadoop.io.compress.CompressionCodec;
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import org.apache.hadoop.security.UserGroupInformation;
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import org.apache.nifi.components.AllowableValue;
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import org.apache.nifi.components.PropertyDescriptor;
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import org.apache.nifi.flowfile.FlowFile;
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import org.apache.nifi.flowfile.attributes.CoreAttributes;
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import org.apache.nifi.processor.ProcessContext;
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import org.apache.nifi.processor.ProcessSession;
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import org.apache.nifi.processor.Relationship;
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import org.apache.nifi.processor.exception.ProcessException;
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import org.apache.nifi.processor.io.InputStreamCallback;
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import org.apache.nifi.stream.io.StreamUtils;
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import org.apache.nifi.util.StopWatch;
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import org.ietf.jgss.GSSException;
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import java.io.BufferedInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.security.PrivilegedAction;
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import java.util.EnumSet;
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import java.util.Optional;
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import java.util.concurrent.TimeUnit;
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import java.util.function.Predicate;
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import java.util.stream.Stream;
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public abstract class AbstractPutHDFS extends AbstractHadoopProcessor {
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protected static final String BUFFER_SIZE_KEY = "io.file.buffer.size";
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protected static final int BUFFER_SIZE_DEFAULT = 4096;
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protected static final String REPLACE_RESOLUTION = "replace";
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protected static final String IGNORE_RESOLUTION = "ignore";
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protected static final String FAIL_RESOLUTION = "fail";
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protected static final String APPEND_RESOLUTION = "append";
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protected static final AllowableValue REPLACE_RESOLUTION_AV = new AllowableValue(REPLACE_RESOLUTION,
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REPLACE_RESOLUTION, "Replaces the existing file if any.");
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protected static final AllowableValue IGNORE_RESOLUTION_AV = new AllowableValue(IGNORE_RESOLUTION, IGNORE_RESOLUTION,
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"Ignores the flow file and routes it to success.");
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protected static final AllowableValue FAIL_RESOLUTION_AV = new AllowableValue(FAIL_RESOLUTION, FAIL_RESOLUTION,
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"Penalizes the flow file and routes it to failure.");
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protected static final AllowableValue APPEND_RESOLUTION_AV = new AllowableValue(APPEND_RESOLUTION, APPEND_RESOLUTION,
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"Appends to the existing file if any, creates a new file otherwise.");
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protected static final PropertyDescriptor CONFLICT_RESOLUTION = new PropertyDescriptor.Builder()
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.name("Conflict Resolution Strategy")
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.description("Indicates what should happen when a file with the same name already exists in the output directory")
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.required(true)
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.defaultValue(FAIL_RESOLUTION_AV.getValue())
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.allowableValues(REPLACE_RESOLUTION_AV, IGNORE_RESOLUTION_AV, FAIL_RESOLUTION_AV, APPEND_RESOLUTION_AV)
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.build();
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@Override
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public void onTrigger(ProcessContext context, ProcessSession session) throws ProcessException {
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final FlowFile flowFile = session.get();
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if (flowFile == null) {
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return;
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}
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final FileSystem hdfs = getFileSystem();
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final Configuration configuration = getConfiguration();
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final UserGroupInformation ugi = getUserGroupInformation();
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if (configuration == null || hdfs == null || ugi == null) {
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getLogger().error("HDFS not configured properly");
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session.transfer(flowFile, getFailureRelationship());
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context.yield();
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return;
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}
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ugi.doAs(new PrivilegedAction<Object>() {
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@Override
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public Object run() {
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Path tempDotCopyFile = null;
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FlowFile putFlowFile = flowFile;
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try {
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final String dirValue = context.getProperty(DIRECTORY).evaluateAttributeExpressions(putFlowFile).getValue();
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final Path configuredRootDirPath = new Path(dirValue);
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final String conflictResponse = context.getProperty(CONFLICT_RESOLUTION).getValue();
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final long blockSize = getBlockSize(context, session, putFlowFile);
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final int bufferSize = getBufferSize(context, session, putFlowFile);
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final short replication = getReplication(context, session, putFlowFile);
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final CompressionCodec codec = getCompressionCodec(context, configuration);
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final String filename = codec != null
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? putFlowFile.getAttribute(CoreAttributes.FILENAME.key()) + codec.getDefaultExtension()
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: putFlowFile.getAttribute(CoreAttributes.FILENAME.key());
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final Path tempCopyFile = new Path(configuredRootDirPath, "." + filename);
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final Path copyFile = new Path(configuredRootDirPath, filename);
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// Create destination directory if it does not exist
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try {
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if (!hdfs.getFileStatus(configuredRootDirPath).isDirectory()) {
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throw new IOException(configuredRootDirPath.toString() + " already exists and is not a directory");
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}
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} catch (FileNotFoundException fe) {
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if (!hdfs.mkdirs(configuredRootDirPath)) {
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throw new IOException(configuredRootDirPath.toString() + " could not be created");
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}
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changeOwner(context, hdfs, configuredRootDirPath, flowFile);
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}
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final boolean destinationExists = hdfs.exists(copyFile);
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// If destination file already exists, resolve that based on processor configuration
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if (destinationExists) {
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switch (conflictResponse) {
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case REPLACE_RESOLUTION:
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if (hdfs.delete(copyFile, false)) {
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getLogger().info("deleted {} in order to replace with the contents of {}",
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new Object[]{copyFile, putFlowFile});
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}
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break;
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case IGNORE_RESOLUTION:
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session.transfer(putFlowFile, getSuccessRelationship());
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getLogger().info("transferring {} to success because file with same name already exists",
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new Object[]{putFlowFile});
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return null;
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case FAIL_RESOLUTION:
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session.transfer(session.penalize(putFlowFile), getFailureRelationship());
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getLogger().warn("penalizing {} and routing to failure because file with same name already exists",
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new Object[]{putFlowFile});
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return null;
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default:
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break;
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}
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}
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// Write FlowFile to temp file on HDFS
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final StopWatch stopWatch = new StopWatch(true);
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session.read(putFlowFile, new InputStreamCallback() {
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@Override
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public void process(InputStream in) throws IOException {
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OutputStream fos = null;
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Path createdFile = null;
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try {
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if (conflictResponse.equals(APPEND_RESOLUTION) && destinationExists) {
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fos = hdfs.append(copyFile, bufferSize);
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} else {
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final EnumSet<CreateFlag> cflags = EnumSet.of(CreateFlag.CREATE, CreateFlag.OVERWRITE);
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if (shouldIgnoreLocality(context, session)) {
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cflags.add(CreateFlag.IGNORE_CLIENT_LOCALITY);
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}
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fos = hdfs.create(tempCopyFile, FsCreateModes.applyUMask(FsPermission.getFileDefault(),
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FsPermission.getUMask(hdfs.getConf())), cflags, bufferSize, replication, blockSize,
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null, null);
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}
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if (codec != null) {
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fos = codec.createOutputStream(fos);
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}
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createdFile = tempCopyFile;
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BufferedInputStream bis = new BufferedInputStream(in);
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StreamUtils.copy(bis, fos);
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bis = null;
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fos.flush();
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} finally {
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try {
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if (fos != null) {
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fos.close();
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}
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} catch (Throwable t) {
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// when talking to remote HDFS clusters, we don't notice problems until fos.close()
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if (createdFile != null) {
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try {
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hdfs.delete(createdFile, false);
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} catch (Throwable ignore) {
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}
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}
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throw t;
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}
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fos = null;
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}
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}
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});
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stopWatch.stop();
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final String dataRate = stopWatch.calculateDataRate(putFlowFile.getSize());
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final long millis = stopWatch.getDuration(TimeUnit.MILLISECONDS);
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tempDotCopyFile = tempCopyFile;
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if (!conflictResponse.equals(APPEND_RESOLUTION)
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|| (conflictResponse.equals(APPEND_RESOLUTION) && !destinationExists)) {
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boolean renamed = false;
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for (int i = 0; i < 10; i++) { // try to rename multiple times.
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if (hdfs.rename(tempCopyFile, copyFile)) {
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renamed = true;
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break;// rename was successful
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}
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Thread.sleep(200L);// try waiting to let whatever might cause rename failure to resolve
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}
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if (!renamed) {
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hdfs.delete(tempCopyFile, false);
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throw new ProcessException("Copied file to HDFS but could not rename dot file " + tempCopyFile
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+ " to its final filename");
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}
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changeOwner(context, hdfs, copyFile, flowFile);
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}
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getLogger().info("copied {} to HDFS at {} in {} milliseconds at a rate of {}",
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new Object[]{putFlowFile, copyFile, millis, dataRate});
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final String newFilename = copyFile.getName();
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final String hdfsPath = copyFile.getParent().toString();
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putFlowFile = session.putAttribute(putFlowFile, CoreAttributes.FILENAME.key(), newFilename);
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putFlowFile = session.putAttribute(putFlowFile, ABSOLUTE_HDFS_PATH_ATTRIBUTE, hdfsPath);
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final Path qualifiedPath = copyFile.makeQualified(hdfs.getUri(), hdfs.getWorkingDirectory());
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session.getProvenanceReporter().send(putFlowFile, qualifiedPath.toString());
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session.transfer(putFlowFile, getSuccessRelationship());
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} catch (final IOException e) {
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Optional<GSSException> causeOptional = findCause(e, GSSException.class, gsse -> GSSException.NO_CRED == gsse.getMajor());
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if (causeOptional.isPresent()) {
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getLogger().warn("An error occurred while connecting to HDFS. "
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+ "Rolling back session, and penalizing flow file {}",
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new Object[] {putFlowFile.getAttribute(CoreAttributes.UUID.key()), causeOptional.get()});
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session.rollback(true);
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} else {
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getLogger().error("Failed to access HDFS due to {}", new Object[]{e});
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session.transfer(putFlowFile, getFailureRelationship());
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}
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} catch (final Throwable t) {
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if (tempDotCopyFile != null) {
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try {
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hdfs.delete(tempDotCopyFile, false);
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} catch (Exception e) {
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getLogger().error("Unable to remove temporary file {} due to {}", new Object[]{tempDotCopyFile, e});
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}
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}
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getLogger().error("Failed to write to HDFS due to {}", new Object[]{t});
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session.transfer(session.penalize(putFlowFile), getFailureRelationship());
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context.yield();
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}
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return null;
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}
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});
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}
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/**
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* Returns with the expected block size.
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*/
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protected abstract long getBlockSize(final ProcessContext context, final ProcessSession session, final FlowFile flowFile);
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/**
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* Returns with the expected buffer size.
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*/
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protected abstract int getBufferSize(final ProcessContext context, final ProcessSession session, final FlowFile flowFile);
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/**
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* Returns with the expected replication factor.
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*/
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protected abstract short getReplication(final ProcessContext context, final ProcessSession session, final FlowFile flowFile);
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/**
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* Returns if file system should ignore locality.
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*/
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protected abstract boolean shouldIgnoreLocality(final ProcessContext context, final ProcessSession session);
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/**
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* If returns a non-null value, the uploaded file's owner will be changed to this value after it is written. This only
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* works if NiFi is running as a user that has privilege to change owner.
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*/
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protected abstract String getOwner(final ProcessContext context, final FlowFile flowFile);
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/**
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* I returns a non-null value, thee uploaded file's group will be changed to this value after it is written. This only
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* works if NiFi is running as a user that has privilege to change group.
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*/
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protected abstract String getGroup(final ProcessContext context, final FlowFile flowFile);
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/**
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* @return The relationship the flow file will be transferred in case of successful execution.
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*/
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protected abstract Relationship getSuccessRelationship();
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/**
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* @return The relationship the flow file will be transferred in case of failed execution.
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*/
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protected abstract Relationship getFailureRelationship();
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/**
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* Returns an optional with the first throwable in the causal chain that is assignable to the provided cause type,
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* and satisfies the provided cause predicate, {@link Optional#empty()} otherwise.
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* @param t The throwable to inspect for the cause.
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* @return
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*/
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private <T extends Throwable> Optional<T> findCause(Throwable t, Class<T> expectedCauseType, Predicate<T> causePredicate) {
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Stream<Throwable> causalChain = Throwables.getCausalChain(t).stream();
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return causalChain
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.filter(expectedCauseType::isInstance)
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.map(expectedCauseType::cast)
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.filter(causePredicate)
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.findFirst();
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}
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protected void changeOwner(final ProcessContext context, final FileSystem hdfs, final Path name, final FlowFile flowFile) {
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try {
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// Change owner and group of file if configured to do so
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final String owner = getOwner(context, flowFile);
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final String group = getGroup(context, flowFile);
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if (owner != null || group != null) {
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hdfs.setOwner(name, owner, group);
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}
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} catch (Exception e) {
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getLogger().warn("Could not change owner or group of {} on HDFS due to {}", new Object[]{name, e});
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}
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}
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}
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@ -17,13 +17,8 @@
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package org.apache.nifi.processors.hadoop;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.CreateFlag;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.fs.permission.FsCreateModes;
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import org.apache.hadoop.fs.permission.FsPermission;
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import org.apache.hadoop.io.compress.CompressionCodec;
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import org.apache.hadoop.security.UserGroupInformation;
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import org.apache.nifi.annotation.behavior.InputRequirement;
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import org.apache.nifi.annotation.behavior.InputRequirement.Requirement;
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import org.apache.nifi.annotation.behavior.ReadsAttribute;
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|
@ -34,42 +29,22 @@ import org.apache.nifi.annotation.behavior.WritesAttributes;
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import org.apache.nifi.annotation.documentation.CapabilityDescription;
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import org.apache.nifi.annotation.documentation.SeeAlso;
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import org.apache.nifi.annotation.documentation.Tags;
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import org.apache.nifi.components.AllowableValue;
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import org.apache.nifi.components.PropertyDescriptor;
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import org.apache.nifi.components.PropertyValue;
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import org.apache.nifi.components.RequiredPermission;
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import org.apache.nifi.expression.ExpressionLanguageScope;
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import org.apache.nifi.flowfile.FlowFile;
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import org.apache.nifi.flowfile.attributes.CoreAttributes;
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import org.apache.nifi.processor.DataUnit;
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import org.apache.nifi.processor.ProcessContext;
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import org.apache.nifi.processor.ProcessSession;
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import org.apache.nifi.processor.Relationship;
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import org.apache.nifi.processor.exception.ProcessException;
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import org.apache.nifi.processor.io.InputStreamCallback;
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import org.apache.nifi.processor.util.StandardValidators;
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import org.apache.nifi.stream.io.StreamUtils;
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import org.apache.nifi.util.StopWatch;
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import org.ietf.jgss.GSSException;
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|
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import com.google.common.base.Throwables;
|
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|
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import java.io.BufferedInputStream;
|
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.security.PrivilegedAction;
|
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.EnumSet;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Optional;
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import java.util.Set;
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import java.util.concurrent.TimeUnit;
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import java.util.function.Predicate;
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import java.util.stream.Stream;
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/**
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* This processor copies FlowFiles to HDFS.
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@ -88,26 +63,9 @@ import java.util.stream.Stream;
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requiredPermission = RequiredPermission.WRITE_DISTRIBUTED_FILESYSTEM,
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explanation = "Provides operator the ability to delete any file that NiFi has access to in HDFS or the local filesystem.")
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})
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public class PutHDFS extends AbstractHadoopProcessor {
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||||
public static final String REPLACE_RESOLUTION = "replace";
|
||||
public static final String IGNORE_RESOLUTION = "ignore";
|
||||
public static final String FAIL_RESOLUTION = "fail";
|
||||
public static final String APPEND_RESOLUTION = "append";
|
||||
|
||||
public static final AllowableValue REPLACE_RESOLUTION_AV = new AllowableValue(REPLACE_RESOLUTION,
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REPLACE_RESOLUTION, "Replaces the existing file if any.");
|
||||
public static final AllowableValue IGNORE_RESOLUTION_AV = new AllowableValue(IGNORE_RESOLUTION, IGNORE_RESOLUTION,
|
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"Ignores the flow file and routes it to success.");
|
||||
public static final AllowableValue FAIL_RESOLUTION_AV = new AllowableValue(FAIL_RESOLUTION, FAIL_RESOLUTION,
|
||||
"Penalizes the flow file and routes it to failure.");
|
||||
public static final AllowableValue APPEND_RESOLUTION_AV = new AllowableValue(APPEND_RESOLUTION, APPEND_RESOLUTION,
|
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"Appends to the existing file if any, creates a new file otherwise.");
|
||||
|
||||
public static final String BUFFER_SIZE_KEY = "io.file.buffer.size";
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||||
public static final int BUFFER_SIZE_DEFAULT = 4096;
|
||||
|
||||
public class PutHDFS extends AbstractPutHDFS {
|
||||
// relationships
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public static final Relationship REL_SUCCESS = new Relationship.Builder()
|
||||
.name("success")
|
||||
.description("Files that have been successfully written to HDFS are transferred to this relationship")
|
||||
|
|
@ -115,20 +73,11 @@ public class PutHDFS extends AbstractHadoopProcessor {
|
|||
|
||||
public static final Relationship REL_FAILURE = new Relationship.Builder()
|
||||
.name("failure")
|
||||
.description(
|
||||
"Files that could not be written to HDFS for some reason are transferred to this relationship")
|
||||
.description("Files that could not be written to HDFS for some reason are transferred to this relationship")
|
||||
.build();
|
||||
|
||||
// properties
|
||||
|
||||
public static final PropertyDescriptor CONFLICT_RESOLUTION = new PropertyDescriptor.Builder()
|
||||
.name("Conflict Resolution Strategy")
|
||||
.description("Indicates what should happen when a file with the same name already exists in the output directory")
|
||||
.required(true)
|
||||
.defaultValue(FAIL_RESOLUTION_AV.getValue())
|
||||
.allowableValues(REPLACE_RESOLUTION_AV, IGNORE_RESOLUTION_AV, FAIL_RESOLUTION_AV, APPEND_RESOLUTION_AV)
|
||||
.build();
|
||||
|
||||
public static final PropertyDescriptor BLOCK_SIZE = new PropertyDescriptor.Builder()
|
||||
.name("Block Size")
|
||||
.description("Size of each block as written to HDFS. This overrides the Hadoop Configuration")
|
||||
|
|
@ -230,239 +179,52 @@ public class PutHDFS extends AbstractHadoopProcessor {
|
|||
}
|
||||
|
||||
@Override
|
||||
public void onTrigger(ProcessContext context, ProcessSession session) throws ProcessException {
|
||||
final FlowFile flowFile = session.get();
|
||||
if (flowFile == null) {
|
||||
return;
|
||||
}
|
||||
|
||||
final FileSystem hdfs = getFileSystem();
|
||||
final Configuration configuration = getConfiguration();
|
||||
final UserGroupInformation ugi = getUserGroupInformation();
|
||||
|
||||
if (configuration == null || hdfs == null || ugi == null) {
|
||||
getLogger().error("HDFS not configured properly");
|
||||
session.transfer(flowFile, REL_FAILURE);
|
||||
context.yield();
|
||||
return;
|
||||
}
|
||||
|
||||
ugi.doAs(new PrivilegedAction<Object>() {
|
||||
@Override
|
||||
public Object run() {
|
||||
Path tempDotCopyFile = null;
|
||||
FlowFile putFlowFile = flowFile;
|
||||
try {
|
||||
final String dirValue = context.getProperty(DIRECTORY).evaluateAttributeExpressions(putFlowFile).getValue();
|
||||
final Path configuredRootDirPath = new Path(dirValue);
|
||||
|
||||
final String conflictResponse = context.getProperty(CONFLICT_RESOLUTION).getValue();
|
||||
|
||||
final Double blockSizeProp = context.getProperty(BLOCK_SIZE).asDataSize(DataUnit.B);
|
||||
final long blockSize = blockSizeProp != null ? blockSizeProp.longValue() : hdfs.getDefaultBlockSize(configuredRootDirPath);
|
||||
|
||||
final Double bufferSizeProp = context.getProperty(BUFFER_SIZE).asDataSize(DataUnit.B);
|
||||
final int bufferSize = bufferSizeProp != null ? bufferSizeProp.intValue() : configuration.getInt(BUFFER_SIZE_KEY, BUFFER_SIZE_DEFAULT);
|
||||
|
||||
final Integer replicationProp = context.getProperty(REPLICATION_FACTOR).asInteger();
|
||||
final short replication = replicationProp != null ? replicationProp.shortValue() : hdfs
|
||||
.getDefaultReplication(configuredRootDirPath);
|
||||
|
||||
final CompressionCodec codec = getCompressionCodec(context, configuration);
|
||||
|
||||
final String filename = codec != null
|
||||
? putFlowFile.getAttribute(CoreAttributes.FILENAME.key()) + codec.getDefaultExtension()
|
||||
: putFlowFile.getAttribute(CoreAttributes.FILENAME.key());
|
||||
|
||||
final Path tempCopyFile = new Path(configuredRootDirPath, "." + filename);
|
||||
final Path copyFile = new Path(configuredRootDirPath, filename);
|
||||
|
||||
// Create destination directory if it does not exist
|
||||
try {
|
||||
if (!hdfs.getFileStatus(configuredRootDirPath).isDirectory()) {
|
||||
throw new IOException(configuredRootDirPath.toString() + " already exists and is not a directory");
|
||||
}
|
||||
} catch (FileNotFoundException fe) {
|
||||
if (!hdfs.mkdirs(configuredRootDirPath)) {
|
||||
throw new IOException(configuredRootDirPath.toString() + " could not be created");
|
||||
}
|
||||
changeOwner(context, hdfs, configuredRootDirPath, flowFile);
|
||||
}
|
||||
|
||||
final boolean destinationExists = hdfs.exists(copyFile);
|
||||
|
||||
// If destination file already exists, resolve that based on processor configuration
|
||||
if (destinationExists) {
|
||||
switch (conflictResponse) {
|
||||
case REPLACE_RESOLUTION:
|
||||
if (hdfs.delete(copyFile, false)) {
|
||||
getLogger().info("deleted {} in order to replace with the contents of {}",
|
||||
new Object[]{copyFile, putFlowFile});
|
||||
}
|
||||
break;
|
||||
case IGNORE_RESOLUTION:
|
||||
session.transfer(putFlowFile, REL_SUCCESS);
|
||||
getLogger().info("transferring {} to success because file with same name already exists",
|
||||
new Object[]{putFlowFile});
|
||||
return null;
|
||||
case FAIL_RESOLUTION:
|
||||
session.transfer(session.penalize(putFlowFile), REL_FAILURE);
|
||||
getLogger().warn("penalizing {} and routing to failure because file with same name already exists",
|
||||
new Object[]{putFlowFile});
|
||||
return null;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// Write FlowFile to temp file on HDFS
|
||||
final StopWatch stopWatch = new StopWatch(true);
|
||||
session.read(putFlowFile, new InputStreamCallback() {
|
||||
|
||||
@Override
|
||||
public void process(InputStream in) throws IOException {
|
||||
OutputStream fos = null;
|
||||
Path createdFile = null;
|
||||
try {
|
||||
if (conflictResponse.equals(APPEND_RESOLUTION_AV.getValue()) && destinationExists) {
|
||||
fos = hdfs.append(copyFile, bufferSize);
|
||||
} else {
|
||||
final EnumSet<CreateFlag> cflags = EnumSet.of(CreateFlag.CREATE, CreateFlag.OVERWRITE);
|
||||
|
||||
final Boolean ignoreLocality = context.getProperty(IGNORE_LOCALITY).asBoolean();
|
||||
if (ignoreLocality) {
|
||||
cflags.add(CreateFlag.IGNORE_CLIENT_LOCALITY);
|
||||
}
|
||||
|
||||
fos = hdfs.create(tempCopyFile, FsCreateModes.applyUMask(FsPermission.getFileDefault(),
|
||||
FsPermission.getUMask(hdfs.getConf())), cflags, bufferSize, replication, blockSize,
|
||||
null, null);
|
||||
}
|
||||
|
||||
if (codec != null) {
|
||||
fos = codec.createOutputStream(fos);
|
||||
}
|
||||
createdFile = tempCopyFile;
|
||||
BufferedInputStream bis = new BufferedInputStream(in);
|
||||
StreamUtils.copy(bis, fos);
|
||||
bis = null;
|
||||
fos.flush();
|
||||
} finally {
|
||||
try {
|
||||
if (fos != null) {
|
||||
fos.close();
|
||||
}
|
||||
} catch (Throwable t) {
|
||||
// when talking to remote HDFS clusters, we don't notice problems until fos.close()
|
||||
if (createdFile != null) {
|
||||
try {
|
||||
hdfs.delete(createdFile, false);
|
||||
} catch (Throwable ignore) {
|
||||
}
|
||||
}
|
||||
throw t;
|
||||
}
|
||||
fos = null;
|
||||
}
|
||||
}
|
||||
|
||||
});
|
||||
stopWatch.stop();
|
||||
final String dataRate = stopWatch.calculateDataRate(putFlowFile.getSize());
|
||||
final long millis = stopWatch.getDuration(TimeUnit.MILLISECONDS);
|
||||
tempDotCopyFile = tempCopyFile;
|
||||
|
||||
if (!conflictResponse.equals(APPEND_RESOLUTION_AV.getValue())
|
||||
|| (conflictResponse.equals(APPEND_RESOLUTION_AV.getValue()) && !destinationExists)) {
|
||||
boolean renamed = false;
|
||||
for (int i = 0; i < 10; i++) { // try to rename multiple times.
|
||||
if (hdfs.rename(tempCopyFile, copyFile)) {
|
||||
renamed = true;
|
||||
break;// rename was successful
|
||||
}
|
||||
Thread.sleep(200L);// try waiting to let whatever might cause rename failure to resolve
|
||||
}
|
||||
if (!renamed) {
|
||||
hdfs.delete(tempCopyFile, false);
|
||||
throw new ProcessException("Copied file to HDFS but could not rename dot file " + tempCopyFile
|
||||
+ " to its final filename");
|
||||
}
|
||||
|
||||
changeOwner(context, hdfs, copyFile, flowFile);
|
||||
}
|
||||
|
||||
getLogger().info("copied {} to HDFS at {} in {} milliseconds at a rate of {}",
|
||||
new Object[]{putFlowFile, copyFile, millis, dataRate});
|
||||
|
||||
final String newFilename = copyFile.getName();
|
||||
final String hdfsPath = copyFile.getParent().toString();
|
||||
putFlowFile = session.putAttribute(putFlowFile, CoreAttributes.FILENAME.key(), newFilename);
|
||||
putFlowFile = session.putAttribute(putFlowFile, ABSOLUTE_HDFS_PATH_ATTRIBUTE, hdfsPath);
|
||||
final Path qualifiedPath = copyFile.makeQualified(hdfs.getUri(), hdfs.getWorkingDirectory());
|
||||
session.getProvenanceReporter().send(putFlowFile, qualifiedPath.toString());
|
||||
|
||||
session.transfer(putFlowFile, REL_SUCCESS);
|
||||
|
||||
} catch (final IOException e) {
|
||||
Optional<GSSException> causeOptional = findCause(e, GSSException.class, gsse -> GSSException.NO_CRED == gsse.getMajor());
|
||||
if (causeOptional.isPresent()) {
|
||||
getLogger().warn("An error occurred while connecting to HDFS. "
|
||||
+ "Rolling back session, and penalizing flow file {}",
|
||||
new Object[] {putFlowFile.getAttribute(CoreAttributes.UUID.key()), causeOptional.get()});
|
||||
session.rollback(true);
|
||||
} else {
|
||||
getLogger().error("Failed to access HDFS due to {}", new Object[]{e});
|
||||
session.transfer(putFlowFile, REL_FAILURE);
|
||||
}
|
||||
} catch (final Throwable t) {
|
||||
if (tempDotCopyFile != null) {
|
||||
try {
|
||||
hdfs.delete(tempDotCopyFile, false);
|
||||
} catch (Exception e) {
|
||||
getLogger().error("Unable to remove temporary file {} due to {}", new Object[]{tempDotCopyFile, e});
|
||||
}
|
||||
}
|
||||
getLogger().error("Failed to write to HDFS due to {}", new Object[]{t});
|
||||
session.transfer(session.penalize(putFlowFile), REL_FAILURE);
|
||||
context.yield();
|
||||
}
|
||||
|
||||
return null;
|
||||
}
|
||||
});
|
||||
protected Relationship getSuccessRelationship() {
|
||||
return REL_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Returns an optional with the first throwable in the causal chain that is assignable to the provided cause type,
|
||||
* and satisfies the provided cause predicate, {@link Optional#empty()} otherwise.
|
||||
* @param t The throwable to inspect for the cause.
|
||||
* @return
|
||||
*/
|
||||
private <T extends Throwable> Optional<T> findCause(Throwable t, Class<T> expectedCauseType, Predicate<T> causePredicate) {
|
||||
Stream<Throwable> causalChain = Throwables.getCausalChain(t).stream();
|
||||
return causalChain
|
||||
.filter(expectedCauseType::isInstance)
|
||||
.map(expectedCauseType::cast)
|
||||
.filter(causePredicate)
|
||||
.findFirst();
|
||||
@Override
|
||||
protected Relationship getFailureRelationship() {
|
||||
return REL_FAILURE;
|
||||
}
|
||||
|
||||
protected void changeOwner(final ProcessContext context, final FileSystem hdfs, final Path name, final FlowFile flowFile) {
|
||||
try {
|
||||
// Change owner and group of file if configured to do so
|
||||
String owner = context.getProperty(REMOTE_OWNER).evaluateAttributeExpressions(flowFile).getValue();
|
||||
String group = context.getProperty(REMOTE_GROUP).evaluateAttributeExpressions(flowFile).getValue();
|
||||
|
||||
owner = owner == null || owner.isEmpty() ? null : owner;
|
||||
group = group == null || group.isEmpty() ? null : group;
|
||||
|
||||
if (owner != null || group != null) {
|
||||
hdfs.setOwner(name, owner, group);
|
||||
}
|
||||
} catch (Exception e) {
|
||||
getLogger().warn("Could not change owner or group of {} on HDFS due to {}", new Object[]{name, e});
|
||||
}
|
||||
@Override
|
||||
protected long getBlockSize(final ProcessContext context, final ProcessSession session, final FlowFile flowFile) {
|
||||
final String dirValue = context.getProperty(DIRECTORY).evaluateAttributeExpressions(flowFile).getValue();
|
||||
final Path configuredRootDirPath = new Path(dirValue);
|
||||
final Double blockSizeProp = context.getProperty(BLOCK_SIZE).asDataSize(DataUnit.B);
|
||||
return blockSizeProp != null ? blockSizeProp.longValue() : getFileSystem().getDefaultBlockSize(configuredRootDirPath);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected int getBufferSize(final ProcessContext context, final ProcessSession session, final FlowFile flowFile) {
|
||||
final Double bufferSizeProp = context.getProperty(BUFFER_SIZE).asDataSize(DataUnit.B);
|
||||
return bufferSizeProp != null ? bufferSizeProp.intValue() : getConfiguration().getInt(BUFFER_SIZE_KEY, BUFFER_SIZE_DEFAULT);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected short getReplication(final ProcessContext context, final ProcessSession session, final FlowFile flowFile) {
|
||||
final String dirValue = context.getProperty(DIRECTORY).evaluateAttributeExpressions(flowFile).getValue();
|
||||
final Path configuredRootDirPath = new Path(dirValue);
|
||||
final Integer replicationProp = context.getProperty(REPLICATION_FACTOR).asInteger();
|
||||
return replicationProp != null ? replicationProp.shortValue() : getFileSystem()
|
||||
.getDefaultReplication(configuredRootDirPath);
|
||||
}
|
||||
|
||||
@Override
|
||||
protected boolean shouldIgnoreLocality(final ProcessContext context, final ProcessSession session) {
|
||||
return context.getProperty(IGNORE_LOCALITY).asBoolean();
|
||||
}
|
||||
|
||||
@Override
|
||||
protected String getOwner(final ProcessContext context, final FlowFile flowFile) {
|
||||
final String owner = context.getProperty(REMOTE_OWNER).evaluateAttributeExpressions(flowFile).getValue();
|
||||
return owner == null || owner.isEmpty() ? null : owner;
|
||||
}
|
||||
|
||||
@Override
|
||||
protected String getGroup(final ProcessContext context, final FlowFile flowFile) {
|
||||
final String group = context.getProperty(REMOTE_GROUP).evaluateAttributeExpressions(flowFile).getValue();
|
||||
return group == null || group.isEmpty() ? null : group;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue