Mark Manley created CASSANDRA-11447:
---------------------------------------
Summary: Flush writer deadlock in Cassandra 2.2.5
Key: CASSANDRA-11447
URL: https://issues.apache.org/jira/browse/CASSANDRA-11447
Project: Cassandra
Issue Type: Bug
Reporter: Mark Manley
Attachments: cassandra.jstack.out
When writing heavily to one of my Cassandra tables, I got a deadlock similar to
CASSANDRA-9882:
{code}
"MemtableFlushWriter:4589" #34721 daemon prio=5 os_prio=0
tid=0x0000000005fc11d0 nid=0x7664 waiting for monitor entry [0x00007fb83f0e5000]
java.lang.Thread.State: BLOCKED (on object monitor)
at
org.apache.cassandra.db.compaction.WrappingCompactionStrategy.handleNotification(WrappingCompactionStrategy.java:266)
- waiting to lock <0x0000000400956258> (a
org.apache.cassandra.db.compaction.WrappingCompactionStrategy)
at
org.apache.cassandra.db.lifecycle.Tracker.notifyAdded(Tracker.java:400)
at
org.apache.cassandra.db.lifecycle.Tracker.replaceFlushed(Tracker.java:332)
at
org.apache.cassandra.db.compaction.AbstractCompactionStrategy.replaceFlushed(AbstractCompactionStrategy.java:235)
at
org.apache.cassandra.db.ColumnFamilyStore.replaceFlushed(ColumnFamilyStore.java:1580)
at
org.apache.cassandra.db.Memtable$FlushRunnable.runMayThrow(Memtable.java:362)
at
org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:28)
at
com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:297)
at
org.apache.cassandra.db.ColumnFamilyStore$Flush.run(ColumnFamilyStore.java:1139)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{code}
The compaction strategies in this keyspace are mixed with one table using LCS
and the rest using DTCS. None of the tables here save for the LCS one seem to
have large SSTable counts:
{code}
Table: active_counters
SSTable count: 2
--
Table: aggregation_job_entries
SSTable count: 2
--
Table: dsp_metrics_log
SSTable count: 207
--
Table: dsp_metrics_ts_5min
SSTable count: 3
--
Table: dsp_metrics_ts_day
SSTable count: 2
--
Table: dsp_metrics_ts_hour
SSTable count: 2
{code}
Yet the symptoms are similar.
The "dsp_metrics_ts_5min" table had had a major compaction shortly before all
this to get rid of the 400+ SStable files before this system went into use, but
they should have been eliminated.
Have other people seen? I am attaching a strack trace.
Thanks!
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