churro morales created HBASE-13724:
--------------------------------------

             Summary: ReplicationSource dies under certain conditions reading a 
sequence file
                 Key: HBASE-13724
                 URL: https://issues.apache.org/jira/browse/HBASE-13724
             Project: HBase
          Issue Type: Bug
            Reporter: churro morales


A little background, 

We run our server in -ea mode and have seen quite a few replication sources 
silently die over the past few months.

Note: the stacktrace I posted below comes from a regionserver running 0.94 but 
quickly looking at this issue, I believe this will happen in 98 too.  

Should we harden replication source to deal with these types of assertion 
errors by catching throwables, should we be dealing with this at the sequence 
file reader level?  Still looking into the root cause of this issue but when 
manually shutdown our regionservers the regionserver that recovered its queue 
replicated that log just fine.  So in our case a simple retry would've worked 
just fine.  

{code}
2015-05-08 11:04:23,348 ERROR 
org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Unexpected 
exception in ReplicationSource, 
currentPath=hdfs://hm6.xxx.flurry.com:9000/hbase/.logs/xxxxx.yy.flurry.com,60020,1426792702998/xxxxx.atl.flurry.com%2C60020%2C1426792702998.1431107922449
java.lang.AssertionError
        at 
org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader$WALReader$WALReaderFSDataInputStream.getPos(SequenceFileLogReader.java:121)
        at 
org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1489)
        at 
org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1479)
        at 
org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1474)
        at 
org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader$WALReader.<init>(SequenceFileLogReader.java:55)
        at 
org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.init(SequenceFileLogReader.java:178)
        at 
org.apache.hadoop.hbase.regionserver.wal.HLog.getReader(HLog.java:734)
        at 
org.apache.hadoop.hbase.replication.regionserver.ReplicationHLogReaderManager.openReader(ReplicationHLogReaderManager.java:69)
        at 
org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.openReader(ReplicationSource.java:583)
        at 
org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:373)
{code}



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