Chao Sun created HDFS-12836:
-------------------------------
Summary: startTxId could be greater than endTxId when tailing
in-progress edit log
Key: HDFS-12836
URL: https://issues.apache.org/jira/browse/HDFS-12836
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs
Reporter: Chao Sun
Assignee: Chao Sun
When {{dfs.ha.tail-edits.in-progress}} is true, edit log tailer will also tail
those in progress edit log segments. However, in the following code:
{code}
if (onlyDurableTxns && inProgressOk) {
endTxId = Math.min(endTxId, committedTxnId);
}
EditLogInputStream elis = EditLogFileInputStream.fromUrl(
connectionFactory, url, remoteLog.getStartTxId(),
endTxId, remoteLog.isInProgress());
{code}
it is possible that {{remoteLog.getStartTxId()}} could be greater than
{{endTxId}}, and therefore will cause the following error:
{code}
2017-11-17 19:55:41,165 ERROR org.apache.hadoop.hdfs.server.namenode.FSImage:
Error replaying edit log at offset 1048576. Expected transaction ID was 87
Recent opcode offsets: 1048576
org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream$PrematureEOFException:
got premature end-of-file at txid 86; expected file to go up to 85
at
org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream.nextOp(RedundantEditLogInputStream.java:197)
at
org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.readOp(EditLogInputStream.java:85)
at
org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream.nextOp(RedundantEditLogInputStream.java:189)
at
org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.readOp(EditLogInputStream.java:85)
at
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:205)
at
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:158)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:882)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:863)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.doTailEdits(EditLogTailer.java:293)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.doWork(EditLogTailer.java:427)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.access$400(EditLogTailer.java:380)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread$1.run(EditLogTailer.java:397)
at
org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:481)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.run(EditLogTailer.java:393)
2017-11-17 19:55:41,165 WARN
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer: Error while reading
edits from disk. Will try again.
org.apache.hadoop.hdfs.server.namenode.EditLogInputException: Error replaying
edit log at offset 1048576. Expected transaction ID was 87
Recent opcode offsets: 1048576
at
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:218)
at
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:158)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:882)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:863)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.doTailEdits(EditLogTailer.java:293)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.doWork(EditLogTailer.java:427)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.access$400(EditLogTailer.java:380)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread$1.run(EditLogTailer.java:397)
at
org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:481)
at
org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.run(EditLogTailer.java:393)
Caused by:
org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream$PrematureEOFException:
got premature end-of-file at txid 86; expected file to go up to 85
at
org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream.nextOp(RedundantEditLogInputStream.java:197)
at
org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.readOp(EditLogInputStream.java:85)
at
org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream.nextOp(RedundantEditLogInputStream.java:189)
at
org.apache.hadoop.hdfs.server.namenode.EditLogInputStream.readOp(EditLogInputStream.java:85)
at
org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:205)
... 9 more
{code}
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