Himanshu Vashishtha created HBASE-7122:
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Summary: 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: 0.96.0
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 the 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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