[HDFS-14674] [SBN read] Got an unexpected txid when tail editlog

• Type: Sub-task
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 3.3.0, 3.2.1, 3.1.3
• Assignee: wangzhaohui
• Reporter: wangzhaohui
• Created: 26/Jul/19 06:42
• Updated: 26/Aug/19 23:01
• Resolved: 23/Aug/19 19:45

Description

Add the following configuration

error:

//
[2019-07-17T11:50:21.048+08:00] [INFO] [Edit log tailer] : replaying edit log: 1/20512836 transactions completed. (0%) [2019-07-17T11:50:21.059+08:00] [INFO] [Edit log tailer] : Edits file http://ip/getJournal?jid=ns1003&segmentTxId=232056426162&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?ipjid=ns1003&segmentTxId=232056426162&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?ipjid=ns1003&segmentTxId=232056426162&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH of size 3126782311 edits # 500 loaded in 3 seconds [2019-07-17T11:50:21.059+08:00] [INFO] [Edit log tailer] : Reading org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream@51ceb7bc expecting start txid #232056752162 [2019-07-17T11:50:21.059+08:00] [INFO] [Edit log tailer] : Start loading edits file http://ip/getJournal?ipjid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?ipjid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?ipjid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH maxTxnipsToRead = 500 [2019-07-17T11:50:21.059+08:00] [INFO] [Edit log tailer] : Fast-forwarding stream 'http://ip/getJournal?jid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?ipjid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?ipjid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH' to transaction ID 232056751662 [2019-07-17T11:50:21.059+08:00] [INFO] [Edit log tailer] ip: Fast-forwarding stream 'http://ip/getJournal?jid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH' to transaction ID 232056751662 [2019-07-17T11:50:21.061+08:00] [ERROR] [Edit log tailer] : Unknown error encountered while tailing edits. Shutting down standby NN. java.io.IOException: There appears to be a gap in the edit log. We expected txid 232056752162, but got txid 232077264498. at org.apache.hadoop.hdfs.server.namenode.MetaRecoveryContext.editLogLoaderPrompt(MetaRecoveryContext.java:94) at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:239) at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:161) at org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:895) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.doTailEdits(EditLogTailer.java:321) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.doWork(EditLogTailer.java:460) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.access$400(EditLogTailer.java:410) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread$1.run(EditLogTailer.java:427) at org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:414) at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.run(EditLogTailer.java:423) [2019-07-17T11:50:21.064+08:00] [INFO] [Edit log tailer] : Exiting with status 1 [2019-07-17T11:50:21.066+08:00] [INFO] [Thread-1] : SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at ip ************************************************************/

 

if dfs.ha.tail-edits.max-txns-per-lock value is 500,when the namenode load the editlog util 500,the current namenode will load the next editlog,but editlog more than 500.So,namenode got an unexpected txid when tail editlog.

 

 

//
[2019-07-17T11:50:21.059+08:00] [INFO] [Edit log tailer] : Edits file http://ip/getJournal?jid=ns1003&segmentTxId=232056426162&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?jid=ns1003&segmentTxId=232056426162&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?jid=ns1003&segmentTxId=232056426162&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH of size 3126782311 edits # 500 loaded in 3 seconds
[2019-07-17T11:50:21.059+08:00] [INFO] [Edit log tailer] : Reading org.apache.hadoop.hdfs.server.namenode.RedundantEditLogInputStream@51ceb7bc expecting start txid #232056752162
[2019-07-17T11:50:21.059+08:00] [INFO] [Edit log tailer] : Start loading edits file http://ip/getJournal?jid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?jid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?jid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH maxTxnsToRead = 500
[2019-07-17T11:50:21.059+08:00] [INFO] [Edit log tailer] : Fast-forwarding stream 'http://ip/getJournal?jid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?jid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH, http://ip/getJournal?jid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH' to transaction ID 232056751662
[2019-07-17T11:50:21.059+08:00] [INFO] [Edit log tailer] : Fast-forwarding stream 'http://ip/getJournal?jid=ns1003&segmentTxId=232077264498&storageInfo=-63%3A1902204348%3A0%3ACID-hope-20180214-20161018-SQYH' to transaction ID 232056751662
[2019-07-17T11:50:21.061+08:00] [ERROR] [Edit log tailer] : Unknown error encountered while tailing edits. Shutting down standby NN.
java.io.IOException: There appears to be a gap in the edit log.  We expected txid 232056752162, but got txid 232077264498.

Read data from JN twice in the same second,changed segmentTxId,finally quit because of txid mismatch.

Issue Links

• breaks: HDFS-14779 Fix logging error in TestEditLog#testMultiStreamsLoadEditWithConfMaxTxns