NIFI-1073: Fixing coverity discovered errors. Resource leaks, and statics

Reviewed by Bryan Bende (bbende@apache.org)

nifi-commons/nifi-socket-utils/src/main/java/org/apache/nifi/io/socket/SSLContextFactory.java

@@ -34,6 +34,7 @@ import javax.net.ssl.TrustManager;
 import javax.net.ssl.TrustManagerFactory;
 
 import org.apache.nifi.util.NiFiProperties;
+import org.apache.nifi.util.file.FileUtils;
 
 public class SSLContextFactory {
 
@@ -58,13 +59,23 @@ public class SSLContextFactory {
 
         // prepare the keystore
         final KeyStore keyStore = KeyStore.getInstance(keystoreType);
-        keyStore.load(new FileInputStream(keystore), keystorePass);
+        final FileInputStream keyStoreStream = new FileInputStream(keystore);
+        try {
+            keyStore.load(keyStoreStream, keystorePass);
+        } finally {
+            FileUtils.closeQuietly(keyStoreStream);
+        }
         final KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
         keyManagerFactory.init(keyStore, keystorePass);
 
         // prepare the truststore
         final KeyStore trustStore = KeyStore.getInstance(truststoreType);
-        trustStore.load(new FileInputStream(truststore), truststorePass);
+        final FileInputStream trustStoreStream = new FileInputStream(truststore);
+        try {
+            trustStore.load(trustStoreStream, truststorePass);
+        } finally {
+            FileUtils.closeQuietly(trustStoreStream);
+        }
         final TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
         trustManagerFactory.init(trustStore);
 

nifi-commons/nifi-utils/src/test/java/org/apache/nifi/stream/io/TestLeakyBucketThrottler.java

@@ -41,7 +41,7 @@ public class TestLeakyBucketThrottler {
 
         final byte[] data = new byte[1024 * 1024 * 4];
         final ByteArrayOutputStream baos = new ByteArrayOutputStream();
-        final OutputStream throttledOut = throttler.newThrottledOutputStream(baos);
+        try (final OutputStream throttledOut = throttler.newThrottledOutputStream(baos)) {
 
             final long start = System.currentTimeMillis();
             throttledOut.write(data);
@@ -51,17 +51,17 @@ public class TestLeakyBucketThrottler {
             assertTrue(millis > 3000);
             assertTrue(millis < 6000);
         }
+    }
 
     @Test(timeout = 10000)
     public void testInputStreamInterface() throws IOException {
-        // throttle rate at 1 MB/sec
-        final LeakyBucketStreamThrottler throttler = new LeakyBucketStreamThrottler(1024 * 1024);
 
         final byte[] data = new byte[1024 * 1024 * 4];
+     // throttle rate at 1 MB/sec
+        try ( final LeakyBucketStreamThrottler throttler = new LeakyBucketStreamThrottler(1024 * 1024);
                 final ByteArrayInputStream bais = new ByteArrayInputStream(data);
                 final InputStream throttledIn = throttler.newThrottledInputStream(bais);
-
+                final ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
-        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
 
             final byte[] buffer = new byte[4096];
             final long start = System.currentTimeMillis();
@@ -69,21 +69,20 @@ public class TestLeakyBucketThrottler {
             while ((len = throttledIn.read(buffer)) > 0) {
                 baos.write(buffer, 0, len);
             }
-        throttler.close();
+
             final long millis = System.currentTimeMillis() - start;
             // should take 4 sec give or take
             assertTrue(millis > 3000);
             assertTrue(millis < 6000);
-        baos.close();
+        }
     }
 
     @Test(timeout = 10000)
     public void testDirectInterface() throws IOException, InterruptedException {
         // throttle rate at 1 MB/sec
-        final LeakyBucketStreamThrottler throttler = new LeakyBucketStreamThrottler(1024 * 1024);
+        try (final LeakyBucketStreamThrottler throttler = new LeakyBucketStreamThrottler(1024 * 1024);
-
+                final ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
             // create 3 threads, each sending ~2 MB
-        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
             final List<Thread> threads = new ArrayList<Thread>();
             for (int i = 0; i < 3; i++) {
                 final Thread t = new WriterThread(i, throttler, baos);
@@ -111,6 +110,7 @@ public class TestLeakyBucketThrottler {
             assertEquals(3 * (2 * 1024 * 1024 + 1), baos.getBufferLength());
             assertEquals((byte) 'A', baos.getUnderlyingBuffer()[baos.getBufferLength() - 1]);
         }
+    }
 
     private static class WriterThread extends Thread {
 

nifi-external/nifi-example-bundle/nifi-nifi-example-processors/src/main/java/org/apache/nifi/processors/WriteResourceToStream.java

@@ -17,6 +17,7 @@
 package org.apache.nifi.processors;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.Collections;
 import java.util.HashSet;
@@ -57,13 +58,16 @@ public class WriteResourceToStream extends AbstractProcessor {
         relationships.add(REL_SUCCESS);
         relationships.add(REL_FAILURE);
         this.relationships = Collections.unmodifiableSet(relationships);
-
+        final InputStream resourceStream = Thread.currentThread()
+                .getContextClassLoader().getResourceAsStream("file.txt");
         try {
-            this.resourceData = IOUtils.toString(Thread.currentThread()
+            this.resourceData = IOUtils.toString(resourceStream);
-                    .getContextClassLoader().getResourceAsStream("file.txt"));
         } catch (IOException e) {
             throw new RuntimeException("Unable to load resources", e);
+        } finally {
+            IOUtils.closeQuietly(resourceStream);
         }
+
     }
 
     @Override

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-cluster/src/main/java/org/apache/nifi/cluster/manager/impl/WebClusterManager.java

@@ -3402,12 +3402,12 @@ public class WebClusterManager implements HttpClusterManager, ProtocolHandler, C
                     @Override
                     public void run() {
                         try {
-                            ((StreamingOutput) nodeResponse.getResponse().getEntity()).write(
+                            try (final OutputStream drain = new OutputStream() {
-                                    new OutputStream() {
                                 @Override
                                 public void write(final int b) { /* drain response */ }
+                            }) {
+                                ((StreamingOutput) nodeResponse.getResponse().getEntity()).write(drain);
                             }
-                            );
                         } catch (final IOException | WebApplicationException ex) {
                             logger.info("Failed clearing out non-client response buffer due to: " + ex, ex);
                         }

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/controller/repository/FileSystemRepository.java

@@ -58,6 +58,7 @@ import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.regex.Pattern;
 
+import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.nifi.controller.repository.claim.ContentClaim;
 import org.apache.nifi.controller.repository.claim.ResourceClaim;
@@ -808,7 +809,13 @@ public class FileSystemRepository implements ContentRepository {
         final Path path = getPath(claim, true);
         final FileInputStream fis = new FileInputStream(path.toFile());
         if (claim.getOffset() > 0L) {
+            try {
                 StreamUtils.skip(fis, claim.getOffset());
+            } catch(IOException ioe) {
+                IOUtils.closeQuietly(fis);
+                throw ioe;
+            }
+
         }
 
         // see javadocs for claim.getLength() as to why we do this.

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/controller/repository/StandardProcessSession.java

@@ -39,6 +39,7 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.regex.Pattern;
 
+import org.apache.commons.io.IOUtils;
 import org.apache.nifi.connectable.Connectable;
 import org.apache.nifi.connectable.Connection;
 import org.apache.nifi.controller.ProcessorNode;
@@ -1759,7 +1760,12 @@ public final class StandardProcessSession implements ProcessSession, ProvenanceE
                 return new DisableOnCloseInputStream(currentReadClaimStream);
             } else {
                 final InputStream rawInStream = context.getContentRepository().read(claim);
+                try {
                     StreamUtils.skip(rawInStream, offset);
+                } catch(IOException ioe) {
+                    IOUtils.closeQuietly(rawInStream);
+                    throw ioe;
+                }
                 return rawInStream;
             }
         } catch (final ContentNotFoundException cnfe) {

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/controller/repository/VolatileContentRepository.java

@@ -39,6 +39,7 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.atomic.AtomicReference;
 
+import org.apache.commons.io.IOUtils;
 import org.apache.nifi.controller.repository.claim.ContentClaim;
 import org.apache.nifi.controller.repository.claim.ResourceClaim;
 import org.apache.nifi.controller.repository.claim.ResourceClaimManager;
@@ -401,14 +402,22 @@ public class VolatileContentRepository implements ContentRepository {
     @Override
     public long exportTo(ContentClaim claim, OutputStream destination) throws IOException {
         final InputStream in = read(claim);
+        try {
             return StreamUtils.copy(in, destination);
+        } finally {
+            IOUtils.closeQuietly(in);
+        }
     }
 
     @Override
     public long exportTo(ContentClaim claim, OutputStream destination, long offset, long length) throws IOException {
         final InputStream in = read(claim);
+        try {
             StreamUtils.skip(in, offset);
             StreamUtils.copy(in, destination, length);
+        } finally {
+            IOUtils.closeQuietly(in);
+        }
         return length;
     }
 

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-jetty/src/main/java/org/apache/nifi/web/server/JettyServer.java

@@ -38,8 +38,10 @@ import java.util.Map;
 import java.util.Set;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
+
 import javax.servlet.DispatcherType;
 import javax.servlet.ServletContext;
+
 import org.apache.nifi.NiFiServer;
 import org.apache.nifi.controller.FlowSerializationException;
 import org.apache.nifi.controller.FlowSynchronizationException;
@@ -51,6 +53,7 @@ import org.apache.nifi.services.FlowService;
 import org.apache.nifi.util.NiFiProperties;
 import org.apache.nifi.web.NiFiWebContext;
 import org.apache.commons.collections4.CollectionUtils;
+import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.nifi.web.ContentAccess;
 import org.apache.nifi.ui.extension.UiExtension;
@@ -372,7 +375,7 @@ public class JettyServer implements NiFiServer {
         }
 
         // get an input stream for the nifi-processor configuration file
-        BufferedReader in = new BufferedReader(new InputStreamReader(jarFile.getInputStream(jarEntry)));
+        try (BufferedReader in = new BufferedReader(new InputStreamReader(jarFile.getInputStream(jarEntry)))) {
 
             // read in each configured type
             String rawComponentType;
@@ -393,6 +396,7 @@ public class JettyServer implements NiFiServer {
                 }
             }
         }
+    }
 
     /**
      * Identifies all known UI extensions and stores them in the specified map.
@@ -437,16 +441,18 @@ public class JettyServer implements NiFiServer {
      */
     private List<String> getWarExtensions(final File war, final String path) {
         List<String> processorTypes = new ArrayList<>();
+
+        // load the jar file and attempt to find the nifi-processor entry
         JarFile jarFile = null;
         try {
-            // load the jar file and attempt to find the nifi-processor entry
             jarFile = new JarFile(war);
             JarEntry jarEntry = jarFile.getJarEntry(path);
 
             // ensure the nifi-processor entry was found
             if (jarEntry != null) {
                 // get an input stream for the nifi-processor configuration file
-                BufferedReader in = new BufferedReader(new InputStreamReader(jarFile.getInputStream(jarEntry)));
+                try (final BufferedReader in = new BufferedReader(
+                        new InputStreamReader(jarFile.getInputStream(jarEntry)))) {
 
                     // read in each configured type
                     String rawProcessorType;
@@ -458,16 +464,11 @@ public class JettyServer implements NiFiServer {
                         }
                     }
                 }
+            }
         } catch (IOException ioe) {
-            logger.warn(String.format("Unable to inspect %s for a custom processor UI.", war));
+            logger.warn("Unable to inspect {} for a custom processor UI.", new Object[]{war, ioe});
         } finally {
-            try {
+            IOUtils.closeQuietly(jarFile);
-                // close the jar file - which closes all input streams obtained via getInputStream above
-                if (jarFile != null) {
-                    jarFile.close();
-                }
-            } catch (IOException ioe) {
-            }
         }
 
         return processorTypes;

nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-api/src/main/java/org/apache/nifi/web/api/dto/DtoFactory.java

@@ -148,7 +148,7 @@ public final class DtoFactory {
         }
     };
 
-    final int MAX_BULLETINS_PER_COMPONENT = 5;
+    final static int MAX_BULLETINS_PER_COMPONENT = 5;
 
     private ControllerServiceLookup controllerServiceLookup;
 

nifi-nar-bundles/nifi-hadoop-bundle/nifi-hdfs-processors/src/test/java/org/apache/nifi/processors/hadoop/TestCreateHadoopSequenceFile.java

@@ -22,7 +22,6 @@ import static org.junit.Assert.assertTrue;
 
 import java.io.File;
 import java.io.FileInputStream;
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.util.HashMap;
@@ -71,9 +70,11 @@ public class TestCreateHadoopSequenceFile {
     }
 
     @Test
-    public void testSimpleCase() throws FileNotFoundException {
+    public void testSimpleCase() throws IOException {
         for (File inFile : inFiles) {
-            controller.enqueue(new FileInputStream(inFile));
+            try (FileInputStream fin = new FileInputStream(inFile) ) {
+                controller.enqueue(fin);
+            }
         }
         controller.run(3);
 
@@ -88,7 +89,9 @@ public class TestCreateHadoopSequenceFile {
     @Test
     public void testSequenceFileSaysValueIsBytesWritable() throws UnsupportedEncodingException, IOException {
         for (File inFile : inFiles) {
-            controller.enqueue(new FileInputStream(inFile));
+            try (FileInputStream fin = new FileInputStream(inFile) ){
+                controller.enqueue(fin);
+            }
         }
         controller.run(3);
 
@@ -118,10 +121,11 @@ public class TestCreateHadoopSequenceFile {
     }
 
     @Test
-    public void testMergedTarData() throws FileNotFoundException {
+    public void testMergedTarData() throws IOException {
         Map<String, String> attributes = new HashMap<>();
         attributes.put(CoreAttributes.MIME_TYPE.key(), "application/tar");
-        controller.enqueue(new FileInputStream("src/test/resources/testdata/13545312236534130.tar"), attributes);
+        try (final FileInputStream fin = new FileInputStream("src/test/resources/testdata/13545312236534130.tar")) {
+            controller.enqueue(fin, attributes);
             controller.run();
             List<MockFlowFile> successSeqFiles = controller.getFlowFilesForRelationship(CreateHadoopSequenceFile.RELATIONSHIP_SUCCESS);
             assertEquals(1, successSeqFiles.size());
@@ -132,12 +136,14 @@ public class TestCreateHadoopSequenceFile {
             assertTrue(data.length > 1000000);
             assertTrue(data.length < 1501000);
         }
+    }
 
     @Test
     public void testMergedZipData() throws IOException {
         Map<String, String> attributes = new HashMap<>();
         attributes.put(CoreAttributes.MIME_TYPE.key(), "application/zip");
-        controller.enqueue(new FileInputStream("src/test/resources/testdata/13545423550275052.zip"), attributes);
+        try (FileInputStream fin = new FileInputStream("src/test/resources/testdata/13545423550275052.zip")){
+            controller.enqueue(fin, attributes);
             controller.run();
             List<MockFlowFile> successSeqFiles = controller.getFlowFilesForRelationship(CreateHadoopSequenceFile.RELATIONSHIP_SUCCESS);
             assertEquals(1, successSeqFiles.size());
@@ -147,6 +153,7 @@ public class TestCreateHadoopSequenceFile {
             // be a couple hundred bytes.
             assertTrue(data.length > 1000000);
             assertTrue(data.length < 1501000);
+        }
 //        FileOutputStream fos = new FileOutputStream("zip-3-randoms.sf");
 //        fos.write(data);
 //        fos.flush();
@@ -157,7 +164,9 @@ public class TestCreateHadoopSequenceFile {
     public void testMergedFlowfilePackagedData() throws IOException {
         Map<String, String> attributes = new HashMap<>();
         attributes.put(CoreAttributes.MIME_TYPE.key(), "application/flowfile-v3");
-        controller.enqueue(new FileInputStream("src/test/resources/testdata/13545479542069498.pkg"), attributes);
+        try ( final FileInputStream fin = new FileInputStream("src/test/resources/testdata/13545479542069498.pkg")) {
+            controller.enqueue(fin, attributes);
+
             controller.run();
             List<MockFlowFile> successSeqFiles = controller.getFlowFilesForRelationship(CreateHadoopSequenceFile.RELATIONSHIP_SUCCESS);
             assertEquals(1, successSeqFiles.size());
@@ -167,6 +176,7 @@ public class TestCreateHadoopSequenceFile {
             // be a couple hundred bytes.
             assertTrue(data.length > 1000000);
             assertTrue(data.length < 1501000);
+        }
 //        FileOutputStream fos = new FileOutputStream("flowfilePkg-3-randoms.sf");
 //        fos.write(data);
 //        fos.flush();

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/AttributesToJSON.java

@@ -66,7 +66,7 @@ public class AttributesToJSON extends AbstractProcessor {
 
     public static final String DESTINATION_ATTRIBUTE = "flowfile-attribute";
     public static final String DESTINATION_CONTENT = "flowfile-content";
-    private final String APPLICATION_JSON = "application/json";
+    private static final String APPLICATION_JSON = "application/json";
 
 
     public static final PropertyDescriptor ATTRIBUTES_LIST = new PropertyDescriptor.Builder()

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ConvertJSONToSQL.java

@@ -561,7 +561,7 @@ public class ConvertJSONToSQL extends AbstractProcessor {
 
         public static TableSchema from(final Connection conn, final String catalog, final String tableName,
                 final boolean translateColumnNames, final boolean includePrimaryKeys) throws SQLException {
-            final ResultSet colrs = conn.getMetaData().getColumns(catalog, null, tableName, "%");
+            try (final ResultSet colrs = conn.getMetaData().getColumns(catalog, null, tableName, "%")) {
 
                 final List<ColumnDescription> cols = new ArrayList<>();
                 while (colrs.next()) {
@@ -571,17 +571,19 @@ public class ConvertJSONToSQL extends AbstractProcessor {
 
                 final Set<String> primaryKeyColumns = new HashSet<>();
                 if (includePrimaryKeys) {
-                final ResultSet pkrs = conn.getMetaData().getPrimaryKeys(catalog, null, tableName);
+                    try (final ResultSet pkrs = conn.getMetaData().getPrimaryKeys(catalog, null, tableName)) {
 
                         while (pkrs.next()) {
                             final String colName = pkrs.getString("COLUMN_NAME");
                             primaryKeyColumns.add(normalizeColumnName(colName, translateColumnNames));
                         }
                     }
+                }
 
                 return new TableSchema(cols, translateColumnNames, primaryKeyColumns);
             }
         }
+    }
 
     private static class ColumnDescription {
         private final String columnName;

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/EncodeContent.java

@@ -171,7 +171,7 @@ public class EncodeContent extends AbstractProcessor {
         }
     }
 
-    private class EncodeBase64 implements StreamCallback {
+    private static class EncodeBase64 implements StreamCallback {
 
         @Override
         public void process(InputStream in, OutputStream out) throws IOException {
@@ -181,7 +181,7 @@ public class EncodeContent extends AbstractProcessor {
         }
     }
 
-    private class DecodeBase64 implements StreamCallback {
+    private static class DecodeBase64 implements StreamCallback {
 
         @Override
         public void process(InputStream in, OutputStream out) throws IOException {
@@ -191,7 +191,7 @@ public class EncodeContent extends AbstractProcessor {
         }
     }
 
-    private class EncodeBase32 implements StreamCallback {
+    private static class EncodeBase32 implements StreamCallback {
 
         @Override
         public void process(InputStream in, OutputStream out) throws IOException {
@@ -201,7 +201,7 @@ public class EncodeContent extends AbstractProcessor {
         }
     }
 
-    private class DecodeBase32 implements StreamCallback {
+    private static class DecodeBase32 implements StreamCallback {
 
         @Override
         public void process(InputStream in, OutputStream out) throws IOException {
@@ -213,7 +213,7 @@ public class EncodeContent extends AbstractProcessor {
 
     private static final byte[] HEX_CHARS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
 
-    private class EncodeHex implements StreamCallback {
+    private static class EncodeHex implements StreamCallback {
 
         @Override
         public void process(InputStream in, OutputStream out) throws IOException {
@@ -231,7 +231,7 @@ public class EncodeContent extends AbstractProcessor {
         }
     }
 
-    private class DecodeHex implements StreamCallback {
+    private static class DecodeHex implements StreamCallback {
 
         @Override
         public void process(InputStream in, OutputStream out) throws IOException {

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/GetHTTP.java

@@ -56,7 +56,6 @@ import org.apache.http.HttpResponse;
 import org.apache.http.auth.AuthScope;
 import org.apache.http.auth.UsernamePasswordCredentials;
 import org.apache.http.client.CredentialsProvider;
-import org.apache.http.client.HttpClient;
 import org.apache.http.client.config.RequestConfig;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.config.Registry;
@@ -67,6 +66,7 @@ import org.apache.http.conn.socket.PlainConnectionSocketFactory;
 import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
 import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
 import org.apache.http.impl.client.BasicCredentialsProvider;
+import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.impl.client.HttpClientBuilder;
 import org.apache.http.impl.conn.BasicHttpClientConnectionManager;
 import org.apache.http.ssl.SSLContextBuilder;
@@ -438,7 +438,7 @@ public class GetHTTP extends AbstractSessionFactoryProcessor {
             }
 
             // create the http client
-            final HttpClient client = clientBuilder.build();
+            final CloseableHttpClient client = clientBuilder.build();
 
             // create request
             final HttpGet get = new HttpGet(url);
@@ -539,7 +539,6 @@ public class GetHTTP extends AbstractSessionFactoryProcessor {
                 logger.error("Failed to process due to {}; rolling back session", new Object[]{t.getMessage()}, t);
                 throw t;
             }
-
         } finally {
             conMan.shutdown();
         }

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/ListFileTransfer.java

@@ -23,6 +23,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.commons.io.IOUtils;
 import org.apache.nifi.components.PropertyDescriptor;
 import org.apache.nifi.flowfile.attributes.CoreAttributes;
 import org.apache.nifi.processor.ProcessContext;
@@ -92,7 +93,13 @@ public abstract class ListFileTransfer extends AbstractListProcessor<FileInfo> {
     @Override
     protected List<FileInfo> performListing(final ProcessContext context, final Long minTimestamp) throws IOException {
         final FileTransfer transfer = getFileTransfer(context);
-        final List<FileInfo> listing = transfer.getListing();
+        final List<FileInfo> listing;
+        try {
+            listing = transfer.getListing();
+        } finally {
+            IOUtils.closeQuietly(transfer);
+        }
+
         if (minTimestamp == null) {
             return listing;
         }

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/PostHTTP.java

@@ -49,6 +49,7 @@ import javax.net.ssl.SSLSession;
 import javax.security.cert.X509Certificate;
 import javax.servlet.http.HttpServletResponse;
 
+import org.apache.commons.io.IOUtils;
 import org.apache.http.Header;
 import org.apache.http.HttpException;
 import org.apache.http.HttpHost;
@@ -637,6 +638,7 @@ public class PostHTTP extends AbstractProcessor {
                         + "configured to deliver FlowFiles; rolling back session", new Object[]{url});
                 session.rollback();
                 context.yield();
+                IOUtils.closeQuietly(client);
                 return;
             }
         } else {

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/SplitText.java

@@ -353,7 +353,7 @@ public class SplitText extends AbstractProcessor {
         }
     }
 
-    private class SplitInfo {
+    private static class SplitInfo {
 
         public long offsetBytes;
         public long lengthBytes;

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/OpenPGPKeyBasedEncryptor.java

@@ -134,7 +134,7 @@ public class OpenPGPKeyBasedEncryptor implements Encryptor {
         return null;
     }
 
-    private class OpenPGPDecryptCallback implements StreamCallback {
+    private static class OpenPGPDecryptCallback implements StreamCallback {
 
         private String provider;
         private String secretKeyring;
@@ -216,7 +216,7 @@ public class OpenPGPKeyBasedEncryptor implements Encryptor {
 
     }
 
-    private class OpenPGPEncryptCallback implements StreamCallback {
+    private static class OpenPGPEncryptCallback implements StreamCallback {
 
         private String algorithm;
         private String provider;

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/util/OpenPGPPasswordBasedEncryptor.java

@@ -65,7 +65,7 @@ public class OpenPGPPasswordBasedEncryptor implements Encryptor {
         return new OpenPGPDecryptCallback(provider, password);
     }
 
-    private class OpenPGPDecryptCallback implements StreamCallback {
+    private static class OpenPGPDecryptCallback implements StreamCallback {
 
         private String provider;
         private char[] password;
@@ -120,7 +120,7 @@ public class OpenPGPPasswordBasedEncryptor implements Encryptor {
 
     }
 
-    private class OpenPGPEncryptCallback implements StreamCallback {
+    private static class OpenPGPEncryptCallback implements StreamCallback {
 
         private String algorithm;
         private String provider;

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/test/java/org/apache/nifi/processors/standard/CaptureServlet.java

@@ -24,8 +24,9 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import javax.ws.rs.core.Response.Status;
 
-import org.apache.activemq.util.ByteArrayOutputStream;
+import org.apache.nifi.stream.io.ByteArrayOutputStream;
 import org.apache.nifi.stream.io.StreamUtils;
+import org.apache.nifi.util.file.FileUtils;
 
 public class CaptureServlet extends HttpServlet {
 
@@ -40,9 +41,12 @@ public class CaptureServlet extends HttpServlet {
     @Override
     protected void doPost(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException {
         final ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try{
             StreamUtils.copy(request.getInputStream(), baos);
             this.lastPost = baos.toByteArray();
-
+        } finally{
+            FileUtils.closeQuietly(baos);
+        }
         response.setStatus(Status.OK.getStatusCode());
     }
 

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/test/java/org/apache/nifi/processors/standard/TestGetHTTP.java

@@ -375,7 +375,7 @@ public class TestGetHTTP {
             // Use context service with a keystore and a truststore
             useSSLContextService(twoWaySslProperties);
 
-            controller.setProperty(GetHTTP.CONNECTION_TIMEOUT, "5 secs");
+            controller.setProperty(GetHTTP.CONNECTION_TIMEOUT, "10 secs");
             controller.setProperty(GetHTTP.URL, destination);
             controller.setProperty(GetHTTP.FILENAME, "testFile");
             controller.setProperty(GetHTTP.ACCEPT_CONTENT_TYPE, "application/json");

nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/test/java/org/apache/nifi/processors/standard/TestTransformXml.java

@@ -20,7 +20,6 @@ import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Paths;
@@ -93,8 +92,9 @@ public class TestTransformXml {
         StringBuilder builder = new StringBuilder();
         builder.append("<data>\n");
 
-        InputStream in = new FileInputStream(new File("src/test/resources/TestTransformXml/tokens.csv"));
+        try(BufferedReader reader = new BufferedReader(new InputStreamReader(
-        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
+                new FileInputStream(new File("src/test/resources/TestTransformXml/tokens.csv"))))){
+
 
             String line = null;
             while ((line = reader.readLine()) != null) {
@@ -111,5 +111,6 @@ public class TestTransformXml {
 
             transformed.assertContentEquals(Paths.get("src/test/resources/TestTransformXml/tokens.xml"));
         }
+    }
 
 }

nifi-nar-bundles/nifi-standard-services/nifi-distributed-cache-services-bundle/nifi-distributed-cache-client-service/pom.xml

@@ -47,5 +47,9 @@
             <groupId>org.apache.nifi</groupId>
             <artifactId>nifi-ssl-context-service-api</artifactId>
         </dependency>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+        </dependency>
     </dependencies>
 </project>

nifi-nar-bundles/nifi-standard-services/nifi-distributed-cache-services-bundle/nifi-distributed-cache-client-service/src/main/java/org/apache/nifi/distributed/cache/client/DistributedMapCacheClientService.java

@@ -24,6 +24,7 @@ import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
 
+import org.apache.commons.io.IOUtils;
 import org.apache.nifi.annotation.documentation.CapabilityDescription;
 import org.apache.nifi.annotation.documentation.SeeAlso;
 import org.apache.nifi.annotation.documentation.Tags;
@@ -298,27 +299,18 @@ public class DistributedMapCacheClientService extends AbstractControllerService
         if (closed) {
             throw new IllegalStateException("Client is closed");
         }
-
+        boolean tryToRequeue = true;
         final CommsSession session = leaseCommsSession();
         try {
             return action.execute(session);
         } catch (final IOException ioe) {
-            try {
+            tryToRequeue = false;
-                session.close();
-            } catch (final IOException ignored) {
-            }
-
             throw ioe;
         } finally {
-            if (!session.isClosed()) {
+            if (tryToRequeue == true && this.closed == false) {
-                if (this.closed) {
-                    try {
-                        session.close();
-                    } catch (final IOException ioe) {
-                    }
-                } else {
                 queue.offer(session);
-                }
+            } else {
+                IOUtils.closeQuietly(session);
             }
         }
     }

nifi-nar-bundles/nifi-standard-services/nifi-distributed-cache-services-bundle/nifi-distributed-cache-client-service/src/main/java/org/apache/nifi/distributed/cache/client/DistributedSetCacheClientService.java

@@ -24,6 +24,7 @@ import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
 
+import org.apache.commons.io.IOUtils;
 import org.apache.nifi.annotation.documentation.CapabilityDescription;
 import org.apache.nifi.annotation.documentation.SeeAlso;
 import org.apache.nifi.annotation.documentation.Tags;
@@ -127,10 +128,7 @@ public class DistributedSetCacheClientService extends AbstractControllerService
         try {
             ProtocolHandshake.initiateHandshake(session.getInputStream(), session.getOutputStream(), versionNegotiator);
         } catch (final HandshakeException e) {
-            try {
+            IOUtils.closeQuietly(session);
-                session.close();
-            } catch (final IOException ioe) {
-            }
 
             throw new IOException(e);
         }
@@ -162,9 +160,9 @@ public class DistributedSetCacheClientService extends AbstractControllerService
             try (final DataOutputStream dos = new DataOutputStream(commsSession.getOutputStream())) {
                 dos.writeUTF("close");
                 dos.flush();
-                commsSession.close();
             } catch (final IOException e) {
             }
+            IOUtils.closeQuietly(commsSession);
         }
         if (logger.isDebugEnabled() && getIdentifier() != null) {
             logger.debug("Closed {}", new Object[]{getIdentifier()});
@@ -185,6 +183,7 @@ public class DistributedSetCacheClientService extends AbstractControllerService
         }
 
         final CommsSession session = leaseCommsSession();
+        boolean tryToRequeue = true;
         try {
             final DataOutputStream dos = new DataOutputStream(session.getOutputStream());
             dos.writeUTF(methodName);
@@ -198,22 +197,13 @@ public class DistributedSetCacheClientService extends AbstractControllerService
             final DataInputStream dis = new DataInputStream(session.getInputStream());
             return dis.readBoolean();
         } catch (final IOException ioe) {
-            try {
+            tryToRequeue = false;
-                session.close();
-            } catch (final IOException ignored) {
-            }
-
             throw ioe;
         } finally {
-            if (!session.isClosed()) {
+            if (tryToRequeue == true && this.closed == false) {
-                if (this.closed) {
-                    try {
-                        session.close();
-                    } catch (final IOException ioe) {
-                    }
-                } else {
                 queue.offer(session);
-                }
+            } else {
+                IOUtils.closeQuietly(session);
             }
         }
     }