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From 曹志富 <cao.zh...@gmail.com>
Subject what this error mean
Date Fri, 29 May 2015 01:39:57 GMT
I have a 25 noedes C* cluster with C* 2.1.3. These days a node occur split
brain many times。

check the log I found this:

    INFO  [MemtableFlushWriter:118] 2015-05-29 08:07:39,176
Memtable.java:378 - Completed flushing
/home/ant/apache-cassandra-2.1.3/bin/../data/data/system/sstable_activity-5a1ff2
67ace03f128563cfae6103c65e/system-sstable_activity-ka-4371-Data.db (8187
bytes) for commitlog position ReplayPosition(segmentId=1432775133526,
position=16684949)
ERROR [IndexSummaryManager:1] 2015-05-29 08:10:30,209
CassandraDaemon.java:167 - Exception in thread
Thread[IndexSummaryManager:1,1,main]
java.lang.AssertionError: null
        at
org.apache.cassandra.io.sstable.SSTableReader.cloneWithNewSummarySamplingLevel(SSTableReader.java:921)
~[apache-cassandra-2.1.3.jar:2.1.3]
        at
org.apache.cassandra.io.sstable.IndexSummaryManager.adjustSamplingLevels(IndexSummaryManager.java:410)
~[apache-cassandra-2.1.3.jar:2.1.3]
        at
org.apache.cassandra.io.sstable.IndexSummaryManager.redistributeSummaries(IndexSummaryManager.java:288)
~[apache-cassandra-2.1.3.jar:2.1.3]
        at
org.apache.cassandra.io.sstable.IndexSummaryManager.redistributeSummaries(IndexSummaryManager.java:238)
~[apache-cassandra-2.1.3.jar:2.1.3]
        at
org.apache.cassandra.io.sstable.IndexSummaryManager$1.runMayThrow(IndexSummaryManager.java:139)
~[apache-cassandra-2.1.3.jar:2.1.3]
        at
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
~[apache-cassandra-2.1.3.jar:2.1.3]
        at
org.apache.cassandra.concurrent.DebuggableScheduledThreadPoolExecutor$UncomplainingRunnable.run(DebuggableScheduledThreadPoolExecutor.java:82)
~[apache-cassandra-2.
1.3.jar:2.1.3]
        at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
[na:1.7.0_71]
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)
[na:1.7.0_71]
        at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
[na:1.7.0_71]
        at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
[na:1.7.0_71]
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
[na:1.7.0_71]
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
[na:1.7.0_71]
        at java.lang.Thread.run(Thread.java:745) [na:1.7.0_71]

I  want to know why this and how to fix this

Thanks all
--------------------------------------
Ranger Tsao

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