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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Growing commit log directory.
Date Mon, 09 Aug 2010 20:50:16 GMT
I have a 16 node 6.3 cluster and two nodes from my cluster are giving
me major headaches.

10.71.71.56   Up         58.19 GB
108271662202116783829255556910108067277    |   ^
10.71.71.61   Down       67.77 GB
123739042516704895804863493611552076888    v   |
10.71.71.66   Up         43.51 GB
127605887595351923798765477786913079296    |   ^
10.71.71.59   Down       90.22 GB
139206422831293007780471430312996086499    v   |
10.71.71.65   Up         22.97 GB
148873535527910577765226390751398592512    |   ^

The symptoms I am seeing are nodes 61 and nodes 59 have huge 6 GB +
commit log directories. They keep growing, along with memory usage,
eventually the logs start showing GCInspection errors and then the
nodes will go OOM

INFO 14:20:01,296 Creating new commitlog segment
/var/lib/cassandra/commitlog/CommitLog-1281378001296.log
 INFO 14:20:02,199 GC for ParNew: 327 ms, 57545496 reclaimed leaving
7955651792 used; max is 9773776896
 INFO 14:20:03,201 GC for ParNew: 443 ms, 45124504 reclaimed leaving
8137412920 used; max is 9773776896
 INFO 14:20:04,314 GC for ParNew: 438 ms, 54158832 reclaimed leaving
8310139720 used; max is 9773776896
 INFO 14:20:05,547 GC for ParNew: 409 ms, 56888760 reclaimed leaving
8480136592 used; max is 9773776896
 INFO 14:20:06,900 GC for ParNew: 441 ms, 58149704 reclaimed leaving
8648872520 used; max is 9773776896
 INFO 14:20:08,904 GC for ParNew: 462 ms, 59185992 reclaimed leaving
8816581312 used; max is 9773776896
 INFO 14:20:09,973 GC for ParNew: 460 ms, 57403840 reclaimed leaving
8986063136 used; max is 9773776896
 INFO 14:20:11,976 GC for ParNew: 447 ms, 59814376 reclaimed leaving
9153134392 used; max is 9773776896
 INFO 14:20:13,150 GC for ParNew: 441 ms, 61879728 reclaimed leaving
9318140296 used; max is 9773776896
java.lang.OutOfMemoryError: Java heap space
Dumping heap to java_pid10913.hprof ...
 INFO 14:22:30,620 InetAddress /10.71.71.66 is now dead.
 INFO 14:22:30,621 InetAddress /10.71.71.65 is now dead.
 INFO 14:22:30,621 GC for ConcurrentMarkSweep: 44862 ms, 261200
reclaimed leaving 9334753480 used; max is 9773776896
 INFO 14:22:30,621 InetAddress /10.71.71.64 is now dead.

Heap dump file created [12730501093 bytes in 253.445 secs]
ERROR 14:28:08,945 Uncaught exception in thread Thread[Thread-2288,5,main]
java.lang.OutOfMemoryError: Java heap space
	at org.apache.cassandra.net.IncomingTcpConnection.run(IncomingTcpConnection.java:71)
ERROR 14:28:08,948 Uncaught exception in thread Thread[Thread-2281,5,main]
java.lang.OutOfMemoryError: Java heap space
	at org.apache.cassandra.net.IncomingTcpConnection.run(IncomingTcpConnection.java:71)
 INFO 14:28:09,017 GC for ConcurrentMarkSweep: 33737 ms, 85880
reclaimed leaving 9335215296 used; max is 9773776896

Does anyone have any ideas what is going on?

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