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https://issues.apache.org/jira/browse/HDFS-12836?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chao Sun updated HDFS-12836:
----------------------------
Status: Patch Available (was: Open)
> 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
> Affects Versions: 3.0.0-alpha1
> Reporter: Chao Sun
> Assignee: Chao Sun
> Attachments: HDFS-12836.1.patch, HDFS-12836.2.patch
>
>
> 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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