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HDFS-14674. [SBN read] Got an unexpected txid when tail editlog. Contributed by wangzhaohui.

This commit is contained in:
Chen Liang 2019-08-23 12:17:34 -07:00
parent 9dc921f5e5
commit d2bb764ffa
2 changed files with 88 additions and 3 deletions
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10
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java
View File

@ -891,7 +891,8 @@ public class FSImage implements Closeable {
StartupProgress prog = NameNode.getStartupProgress();
prog.beginPhase(Phase.LOADING_EDITS);
long prevLastAppliedTxId = lastAppliedTxId;
long prevLastAppliedTxId = lastAppliedTxId;
long remainingReadTxns = maxTxnsToRead;
try {
FSEditLogLoader loader = new FSEditLogLoader(target, lastAppliedTxId);
@ -908,8 +909,8 @@ public class FSImage implements Closeable {
(lastAppliedTxId + 1) + logSuppressed);
}
try {
loader.loadFSEdits(editIn, lastAppliedTxId + 1, maxTxnsToRead,
startOpt, recovery);
remainingReadTxns -= loader.loadFSEdits(editIn, lastAppliedTxId + 1,
remainingReadTxns, startOpt, recovery);
} finally {
// Update lastAppliedTxId even in case of error, since some ops may
// have been successfully applied before the error.
@ -920,6 +921,9 @@ public class FSImage implements Closeable {
&& recovery != null) {
lastAppliedTxId = editIn.getLastTxId();
}
if (remainingReadTxns <= 0) {
break;
}
}
} finally {
FSEditLog.closeAllStreams(editStreams);

81
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestEditLog.java
View File

@ -305,6 +305,87 @@ public class TestEditLog {
return loader.loadFSEdits(new EditLogByteInputStream(data), 1);
}
@Test
public void testMultiStreamsLoadEditWithConfMaxTxns()
throws IOException {
Configuration conf = getConf();
MiniDFSCluster cluster = null;
FileSystem fileSystem = null;
FSImage writeFsImage = null;
try {
cluster = new MiniDFSCluster
.Builder(conf)
.numDataNodes(NUM_DATA_NODES)
.build();
cluster.waitActive();
fileSystem = cluster.getFileSystem();
final FSNamesystem namesystem = cluster.getNamesystem();
writeFsImage = namesystem.getFSImage();
for (Iterator<URI> it = cluster.getNameDirs(0)
.iterator(); it.hasNext();) {
File dir = new File(it.next().getPath());
System.out.println(dir);
}
// Roll log so new output buffer size takes effect
// we should now be writing to edits_inprogress_3
long originalLastInodeId = namesystem.dir.getLastInodeId();
// Reopen some files as for append
Transactions trans = new Transactions(
namesystem, NUM_TRANSACTIONS, NUM_TRANSACTIONS / 2);
trans.run();
// Roll another time to finalize edits_inprogress_3
writeFsImage.rollEditLog(NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
Transactions trans1 = new Transactions(
namesystem, NUM_TRANSACTIONS, NUM_TRANSACTIONS / 2);
trans1.run();
writeFsImage.rollEditLog(NameNodeLayoutVersion.CURRENT_LAYOUT_VERSION);
namesystem.dir.resetLastInodeIdWithoutChecking(originalLastInodeId);
for(Iterator<StorageDirectory> it = writeFsImage.getStorage().
dirIterator(NameNodeDirType.EDITS); it.hasNext();){
long expectedTxns = (2 * NUM_TRANSACTIONS) + 2;
File editFile = NNStorage.getFinalizedEditsFile(it.next(),
1, expectedTxns);
File editFile1 = NNStorage.getFinalizedEditsFile(it.next(),
203, 404);
assertTrue("Expect " + editFile + " exists", editFile.exists());
assertTrue("Expect " + editFile1 + " exists", editFile1.exists());
EditLogFileInputStream editLogFileInputStream1 =
new EditLogFileInputStream(editFile, 1, 202, false);
EditLogFileInputStream editLogFileInputStream2 =
new EditLogFileInputStream(editFile1, 203, 404, false);
List<EditLogInputStream> editStreams = Lists.newArrayList();
editStreams.add(editLogFileInputStream1);
editStreams.add(editLogFileInputStream2);
FSImage readFsImage = new FSImage(conf);
try {
readFsImage.loadEdits(editStreams, namesystem, 100, null, null);
} catch (Exception e){
LOG.error("There appears to be an out-of-order edit in the edit log",
e.getMessage());
fail("no exception should be thrown");
} finally {
if (readFsImage != null) {
readFsImage.close();
}
}
}
} finally {
try {
if(fileSystem != null) {
fileSystem.close();
}
if(cluster != null) {
cluster.shutdown();
}
if(writeFsImage != null){
writeFsImage.close();
}
} catch (Throwable t) {
LOG.error("Couldn't shut down cleanly", t);
}
}
}
/**
* Simple test for writing to and rolling the edit log.
*/