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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:
---------------------------------------
Status: Patch Available (was: Open)
> 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: Sub-task
> Components: Replication
> Affects Versions: 0.94.2
> Reporter: Himanshu Vashishtha
> Assignee: Himanshu Vashishtha
> Fix For: 0.96.0
>
> Attachments: HBase-7122.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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