How to recover from IndexCorruptedException?

Some shards on my ES-Instance get an IndexCorruptedException. I assume this
was caused by java 1.7u51, which may cause such issues. But how to recover
from this corrupted shard? The currently affected shards seems endless to
be recovered and the ES-logs grow up to several megabytes of size. I assume
the data within tha affected shards is lost. But how to delete the affected
shards?

regards,
markus

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Can you post more information about the IndexCorruptedException, stacktrace,
or reproduction?

Where did you get the information that 7u51 produces
IndexCorruptedException?

Jörg

On Tue, Nov 25, 2014 at 9:11 AM, msbreuer@gmail.com wrote:

Some shards on my ES-Instance get an IndexCorruptedException. I assume
this was caused by java 1.7u51, which may cause such issues. But how to
recover from this corrupted shard? The currently affected shards seems
endless to be recovered and the ES-logs grow up to several megabytes of
size. I assume the data within tha affected shards is lost. But how to
delete the affected shards?

regards,
markus

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Can you post more information about the IndexCorruptedException, stacktrace,
or reproduction?

I have to correct me: CorruptIndexException

[2014-11-21 20:15:44,225][WARN ][cluster.action.shard ] [isetta]
[XXXXX][2] received shard failed for [ips-mac-mips-mac-k01-2014.08][2],
node[KjJsJYd8TXShEgm1S25_Zw], [R], s[INITIALIZING], indexUUID
[onrMITrgRTyIDc4RL-p8xQ], reason [engine failure, message [corrupted
preexisting index][CorruptIndexException[[XXXXX][2] Preexisting corrupted
index [corrupted_aPP4lMokQsKstBqLfYTTTA] caused by:
CorruptIndexException[checksum failed (hardware problem?) : expected=uhifyc
actual=drw2lb (resource=name [_rgh_es090_0.pos], length [142663622],
checksum [uhifyc], writtenBy [4.10.2])]
org.apache.lucene.index.CorruptIndexException: checksum failed (hardware
problem?) : expected=uhifyc actual=drw2lb (resource=name
[_rgh_es090_0.pos], length [142663622], checksum [uhifyc], writtenBy
[4.10.2])
at
org.elasticsearch.index.store.Store$VerifyingIndexOutput.readAndCompareChecksum(Store.java:882)
at
org.elasticsearch.index.store.Store$VerifyingIndexOutput.writeBytes(Store.java:894)
at
org.elasticsearch.indices.recovery.RecoveryTarget$FileChunkTransportRequestHandler.messageReceived(RecoveryTarget.java:591)
at
org.elasticsearch.indices.recovery.RecoveryTarget$FileChunkTransportRequestHandler.messageReceived(RecoveryTarget.java:535)
at
org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.run(MessageChannelHandler.java:275)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
]]]

Where did you get the information that 7u51 produces
IndexCorruptedException?

Take a look at here: http://wiki.apache.org/lucene-java/JavaBugs

especially to https://issues.apache.org/jira/browse/LUCENE-5212

Jörg

On Tue, Nov 25, 2014 at 9:11 AM, <msbr...@gmail.com <javascript:>> wrote:

Some shards on my ES-Instance get an IndexCorruptedException. I assume
this was caused by java 1.7u51, which may cause such issues. But how to
recover from this corrupted shard? The currently affected shards seems
endless to be recovered and the ES-logs grow up to several megabytes of
size. I assume the data within tha affected shards is lost. But how to
delete the affected shards?

regards,
markus

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