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From Michael Moores <mmoo...@real.com>
Subject 0.7 beta2 - Fatal exception from RowMutationVerbHandler
Date Tue, 12 Oct 2010 20:51:46 GMT
I have a cluster of 8 nodes with a replication factor of 3 and consistency of QUORUM.
When I stop one node in the cluster I end up with socket read timeouts to other nodes:
org.apache.thrift.transport.TTransportException: java.net.SocketTimeoutException: Read timed
out
The timeout is set to 4 seconds.

The recent write latency on the other nodes becomes elevated, reaching 5-6 seconds.
The load on the cluster is minimal.

I looked at the system log on an adjacent node in the ring and found this output:

 INFO [WRITE-kv2-app02.dev.real.com/172.27.109.32] 2010-10-12 12:13:36,712 OutboundTcpConnection.java
(line 115) error writing to kv2-app02.dev.real.com/172.27.109.32
 INFO [WRITE-kv2-app02.dev.real.com/172.27.109.32] 2010-10-12 12:13:50,336 OutboundTcpConnection.java
(line 115) error writing to kv2-app02.dev.real.com/172.27.109.32
 INFO [Timer-0] 2010-10-12 12:14:22,792 Gossiper.java (line 196) InetAddress /172.27.109.32
is now dead.
ERROR [MUTATION_STAGE:1315] 2010-10-12 12:14:24,917 DebuggableThreadPoolExecutor.java (line
103) Error in ThreadPoolExecutor
java.nio.BufferUnderflowException
        at java.nio.HeapByteBuffer.get(HeapByteBuffer.java:127)
        at java.nio.ByteBuffer.get(ByteBuffer.java:675)
        at org.apache.cassandra.db.RowMutationVerbHandler.doVerb(RowMutationVerbHandler.java:62)
        at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:50)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
ERROR [MUTATION_STAGE:1315] 2010-10-12 12:14:24,918 AbstractCassandraDaemon.java (line 88)
Fatal exception in thread Thread[MUTATION_STAGE:1315,5,main]
java.nio.BufferUnderflowException
        at java.nio.HeapByteBuffer.get(HeapByteBuffer.java:127)
        at java.nio.ByteBuffer.get(ByteBuffer.java:675)
        at org.apache.cassandra.db.RowMutationVerbHandler.doVerb(RowMutationVerbHandler.java:62)
        at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:50)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
ERROR [MUTATION_STAGE:1605] 2010-10-12 12:14:28,919 DebuggableThreadPoolExecutor.java (line
103) Error in ThreadPoolExecutor
java.nio.BufferUnderflowException
        at java.nio.HeapByteBuffer.get(HeapByteBuffer.java:127)
        at java.nio.ByteBuffer.get(ByteBuffer.java:675)
        at org.apache.cassandra.db.RowMutationVerbHandler.doVerb(RowMutationVerbHandler.java:62)
        at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:50)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
....
....

I restarted the previously stopped node, and the system recovers, but with a few more underlflow
exceptions:

 INFO [GOSSIP_STAGE:1] 2010-10-12 12:15:44,537 Gossiper.java (line 594) Node /172.27.109.32
has restarted, now UP again
 INFO [HINTED-HANDOFF-POOL:1] 2010-10-12 12:15:44,537 HintedHandOffManager.java (line 196)
Started hinted handoff for endpoint /172.27.109.32
 INFO [GOSSIP_STAGE:1] 2010-10-12 12:15:44,537 StorageService.java (line 643) Node /172.27.109.32
state jump to normal
 INFO [HINTED-HANDOFF-POOL:1] 2010-10-12 12:15:44,538 HintedHandOffManager.java (line 252)
Finished hinted handoff of 0 rows to endpoint /172.27.109.32
 INFO [GOSSIP_STAGE:1] 2010-10-12 12:15:44,538 StorageService.java (line 650) Will not change
my token ownership to /172.27.109.32
ERROR [MUTATION_STAGE:1635] 2010-10-12 12:15:45,083 DebuggableThreadPoolExecutor.java (line
103) Error in ThreadPoolExecutor
java.nio.BufferUnderflowException
        at java.nio.HeapByteBuffer.get(HeapByteBuffer.java:127)
        at java.nio.ByteBuffer.get(ByteBuffer.java:675)
        at org.apache.cassandra.db.RowMutationVerbHandler.doVerb(RowMutationVerbHandler.java:62)
        at org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:50)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)

 


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