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https://issues.apache.org/jira/browse/CASSANDRA-13235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15877552#comment-15877552
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zhaoyan commented on CASSANDRA-13235:
-------------------------------------
like:
{code}
NFO [NativePoolCleaner] 2017-02-21 23:03:13,947 ColumnFamilyStore.java:1211 -
Flushing largest CFS(Keyspace='keyspacename', ColumnFamily='tablename') to free
up room. Used total: 0.11/0.09, live: 0.11/0.09, flushing: 0.00/0.00, this:
0.07/0.07
INFO [NativePoolCleaner] 2017-02-21 23:03:13,947 ColumnFamilyStore.java:905 -
Enqueuing flush of tablename: 234916964 (7%) on-heap, 7040478 (0%) off-heap
INFO [MemtableFlushWriter:108083] 2017-02-21 23:03:15,579 Memtable.java:347 -
Writing Memtable-tablename@86463873(5.512MiB serialized bytes, 629467 ops,
7%/0% of on/off-heap limit)
{code}
{code}
INFO [ScheduledTasks:1] 2017-02-21 23:03:16,068 MessagingService.java:929 -
MUTATION messages were dropped in last 5000 ms: 721 for internal timeout and 0
for cross node timeout
{code}
{code}
INFO [ScheduledTasks:1] 2017-02-21 23:02:51,016 MessagingService.java:929 -
READ_REPAIR messages were dropped in last 5000 ms: 1 for internal timeout and 0
for cross node timeout
{code}
> All thread blocked and writes pending.
> --------------------------------------
>
> Key: CASSANDRA-13235
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13235
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: jdk8
> cassandra 2.1.15
> Reporter: zhaoyan
>
> I found cassandra many pending MutationStage task
> {code}
> NFO [Service Thread] 2017-02-17 16:00:14,440 StatusLogger.java:51 - Pool
> Name Active Pending Completed Blocked All Time
> Blocked
> INFO [Service Thread] 2017-02-17 16:00:14,440 StatusLogger.java:66 -
> MutationStage 384 4553 4294213082 0
> 0
> INFO [Service Thread] 2017-02-17 16:00:14,441 StatusLogger.java:66 -
> RequestResponseStage 0 0 2172612382 0
> 0
> INFO [Service Thread] 2017-02-17 16:00:14,441 StatusLogger.java:66 -
> ReadRepairStage 0 0 5378852 0
> 0
> INFO [Service Thread] 2017-02-17 16:00:14,441 StatusLogger.java:66 -
> CounterMutationStage 0 0 0 0
> 0
> INFO [Service Thread] 2017-02-17 16:00:14,441 StatusLogger.java:66 -
> ReadStage 5 0 577242284 0
> 0
> INFO [Service Thread] 2017-02-17 16:00:14,441 StatusLogger.java:66 -
> MiscStage 0 0 0 0
> 0
> INFO [Service Thread] 2017-02-17 16:00:14,441 StatusLogger.java:66 -
> HintedHandoff 0 0 1480 0
> 0
> INFO [Service Thread] 2017-02-17 16:00:14,441 StatusLogger.java:66 -
> GossipStage 0 0 9342250 0
> 0
> {code}
> And I found there are many blocked thread with jstack
> {code}
> "SharedPool-Worker-28" #416 daemon prio=5 os_prio=0 tid=0x0000000001fb8000
> nid=0x7459 waiting for monitor entry [0x00007fdd83ca0000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at sun.misc.Unsafe.monitorEnter(Native Method)
> at
> org.apache.cassandra.utils.concurrent.Locks.monitorEnterUnsafe(Locks.java:46)
> at
> org.apache.cassandra.db.AtomicBTreeColumns.addAllWithSizeDelta(AtomicBTreeColumns.java:202)
> at org.apache.cassandra.db.Memtable.put(Memtable.java:210)
> at
> org.apache.cassandra.db.ColumnFamilyStore.apply(ColumnFamilyStore.java:1244)
> at org.apache.cassandra.db.Keyspace.apply(Keyspace.java:396)
> at org.apache.cassandra.db.Keyspace.apply(Keyspace.java:359)
> at org.apache.cassandra.db.Mutation.apply(Mutation.java:214)
> at
> org.apache.cassandra.db.MutationVerbHandler.doVerb(MutationVerbHandler.java:54)
> at
> org.apache.cassandra.net.MessageDeliveryTask.run(MessageDeliveryTask.java:64)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at
> org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164)
> at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
> at java.lang.Thread.run(Thread.java:745)
> {code}
> To use "grep BLOCKED |wc -l", get Number is 384
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