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https://issues.apache.org/jira/browse/CASSANDRA-7724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14132564#comment-14132564
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Anton Lebedevich commented on CASSANDRA-7724:
---------------------------------------------
Yes, timeouts are expected but I'd expect at least one of Native-Transport
threads to make a progress. In the thread dump attached all non-idle
Native-Transport threads are waiting on the same CountDownLatch:
{noformat}
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000006b3f0f4a0> (a
java.util.concurrent.CountDownLatch$Sync)
at
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedNanos(AbstractQueuedSynchronizer.java:1037)
at
java.util.concurrent.locks.AbstractQueuedSynchronizer.tryAcquireSharedNanos(AbstractQueuedSynchronizer.java:1328)
at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:277)
at
org.apache.cassandra.service.paxos.AbstractPaxosCallback.await(AbstractPaxosCallback.java:60)
at
org.apache.cassandra.service.StorageProxy.preparePaxos(StorageProxy.java:391)
at
org.apache.cassandra.service.StorageProxy.beginAndRepairPaxos(StorageProxy.java:321)
at org.apache.cassandra.service.StorageProxy.cas(StorageProxy.java:220)
at
org.apache.cassandra.cql3.statements.ModificationStatement.executeWithCondition(ModificationStatement.java:567)
at
org.apache.cassandra.cql3.statements.ModificationStatement.execute(ModificationStatement.java:530)
at
org.apache.cassandra.cql3.QueryProcessor.processStatement(QueryProcessor.java:158)
{noformat}
> Native-Transport threads get stuck in StorageProxy.preparePaxos with no one
> making progress
> -------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-7724
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7724
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: Linux 3.13.11-4 #4 SMP PREEMPT x86_64 Intel(R) Core(TM)
> i7 CPU 950 @ 3.07GHz GenuineIntel
> java version "1.8.0_05"
> Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
> Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)
> cassandra 2.0.9
> Reporter: Anton Lebedevich
> Attachments: cassandra.threads2
>
>
> We've got a lot of write timeouts (cas) when running
> "INSERT INTO cas_demo(pri_id, sec_id, flag, something) VALUES(?, ?, ?, ?) IF
> NOT EXISTS"
> from 16 connections in parallel using the same pri_id and different sec_id.
> Doing the same from 4 connections in parallel works ok.
> All configuration values are at their default values.
> CREATE TABLE cas_demo (
> pri_id varchar,
> sec_id varchar,
> flag boolean,
> something set<varchar>,
> PRIMARY KEY (pri_id, sec_id)
> );
> CREATE INDEX cas_demo_flag ON cas_demo(flag);
> Full thread dump is attached.
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