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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7122) Proper warning message when opening a log file with no entries (idle cluster)
Date Thu, 14 Mar 2013 02:34:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13601980#comment-13601980

Hadoop QA commented on HBASE-7122:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include any new or modified
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/4809//console

This message is automatically generated.
> 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: 0.95.0
>         Attachments: HBase-7122-94.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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