Wei-Chiu Chuang created HDFS-14557:
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Summary: JournalNode error: Can't scan a pre-transactional edit log
Key: HDFS-14557
URL: https://issues.apache.org/jira/browse/HDFS-14557
Project: Hadoop HDFS
Issue Type: Bug
Components: ha
Affects Versions: 2.6.0
Reporter: Wei-Chiu Chuang
We saw the following error in JournalNodes a few times before.
{noformat}
2016-09-22 12:44:24,505 WARN org.apache.hadoop.hdfs.server.namenode.FSImage:
Caught exception after scanning through 0 ops from /data/1/dfs/current/ed
its_inprogress_0000000000000661942 while determining its valid length. Position
was 761856
java.io.IOException: Can't scan a pre-transactional edit log.
at
org.apache.hadoop.hdfs.server.namenode.FSEditLogOp$LegacyReader.scanOp(FSEditLogOp.java:4592)
at
org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream.scanNextOp(EditLogFileInputStream.java:245)
at
org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream.scanEditLog(EditLogFileInputStream.java:355)
at
org.apache.hadoop.hdfs.server.namenode.FileJournalManager$EditLogFile.scanLog(FileJournalManager.java:551)
at
org.apache.hadoop.hdfs.qjournal.server.Journal.scanStorageForLatestEdits(Journal.java:193)
at org.apache.hadoop.hdfs.qjournal.server.Journal.<init>(Journal.java:153)
at
org.apache.hadoop.hdfs.qjournal.server.JournalNode.getOrCreateJournal(JournalNode.java:90)
{noformat}
The edit file was corrupt, and one possible culprit of this error is a full
disk. The JournalNode can't recovered and must be resync manually from other
JournalNodes.
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