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https://issues.apache.org/jira/browse/HBASE-7122?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Himanshu Vashishtha updated HBASE-7122:
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Attachment: HBase-7122-95-v2.patch
Thanks Jiashen.
In case log rolling gets an exception, it aborts the regionserver after
retrying some time (defined by error tolerance in HLog). If it aborts, the log
is handled by a failover worker.
Anyway, to handle your concern, I added a check to to ensure if it is not a
current log, then proceed as usual rather than retrying the same log.
Please review.
> Proper warning message when opening a log file with no entries (idle cluster)
> -----------------------------------------------------------------------------
>
> Key: HBASE-7122
> URL: https://issues.apache.org/jira/browse/HBASE-7122
> Project: HBase
> Issue Type: Bug
> Components: Replication
> Affects Versions: 0.94.2
> Reporter: Himanshu Vashishtha
> Assignee: Himanshu Vashishtha
> Fix For: 0.95.1
>
> Attachments: HBase-7122-94.patch, HBase-7122-95.patch,
> HBase-7122-95-v2.patch, HBase-7122.patch, HBASE-7122.v2.patch
>
>
> In case the cluster is idle and the log has rolled (offset to 0),
> replicationSource tries to open the log and gets an EOF exception. This gets
> printed after every 10 sec until an entry is inserted in it.
> {code}
> 2012-11-07 15:47:40,924 DEBUG regionserver.ReplicationSource
> (ReplicationSource.java:openReader(487)) - Opening log for replication
> c0315.hal.cloudera.com%2C40020%2C1352324202860.1352327804874 at 0
> 2012-11-07 15:47:40,926 WARN regionserver.ReplicationSource
> (ReplicationSource.java:openReader(543)) - 1 Got:
> java.io.EOFException
> at java.io.DataInputStream.readFully(DataInputStream.java:180)
> at java.io.DataInputStream.readFully(DataInputStream.java:152)
> at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1508)
> at
> org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1486)
> at
> org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1475)
> at
> org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1470)
> at
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader$WALReader.<init>(SequenceFileLogReader.java:55)
> at
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.init(SequenceFileLogReader.java:175)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLog.getReader(HLog.java:716)
> at
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.openReader(ReplicationSource.java:491)
> at
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:290)
> 2012-11-07 15:47:40,927 WARN regionserver.ReplicationSource
> (ReplicationSource.java:openReader(547)) - Waited too long for this file,
> considering dumping
> 2012-11-07 15:47:40,927 DEBUG regionserver.ReplicationSource
> (ReplicationSource.java:sleepForRetries(562)) - Unable to open a reader,
> sleeping 1000 times 10
> {code}
> We should reduce the log spewing in this case (or some informative message,
> based on the offset).
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