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From "Semen Boikov (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (IGNITE-2465) Assertion in load cache closure
Date Thu, 18 Feb 2016 07:44:18 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-2465?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Semen Boikov closed IGNITE-2465.
--------------------------------

> Assertion in load cache closure
> -------------------------------
>
>                 Key: IGNITE-2465
>                 URL: https://issues.apache.org/jira/browse/IGNITE-2465
>             Project: Ignite
>          Issue Type: Bug
>          Components: cache
>    Affects Versions: 1.5.0.final
>            Reporter: Denis Magda
>            Priority: Blocker
>              Labels: important
>             Fix For: 1.6
>
>
> This is a tricky one. Every once in a while I get an assertion exception due to a null
cache instance. It's difficult to reproduce, but the reason is more or less clear.
> First, here's the sequence of events:
> 1) node N0 starts a cache with GridGain's LocalCacheStore configured (see the cache config
below).
> 2) also, N0 registers a listener for the Ignite DISCO_EVENTS.
> 3) node N1 joins the cluster.
> 4) N0 receives a discovery event (EVT_NODE_JOINED) and triggers cache loading using IgniteCache.loadCache(null).
> 5) N1 throws an AssertionException due to Ignite.cache("persistent-cache") call returning
a null.
> From the log snippet below you can see that the exception is first reported and then
a millisecond later GridCacheProcessor reports that the cache was started. This means that
the cache load closure starts executing on node N1 a bit too early while the cache is still
being started. I believe Ignite must be able to handle such race properly.
> {noformat}
> 9319 [pub-#212%N1%] ERROR GridJobWorker - Failed to execute job due to unexpected runtime
exception [jobId=0af5bad7251-9f7af4ba-6a64-4de4-b5d2-81d59be05303, ses=GridJobSessionImpl
[ses=GridTaskSessionImpl [taskName=o.a.i.i.processors.cache.GridCacheAdapter$LoadCacheClosure,
dep=LocalDeployment [super=GridDeployment [ts=1453807336443, depMode=SHARED, clsLdr=sun.misc.Launcher$AppClassLoader@15db9742,
clsLdrId=46f5bad7251-9f7af4ba-6a64-4de4-b5d2-81d59be05303, userVer=0, loc=true, sampleClsName=java.lang.String,
pendingUndeploy=false, undeployed=false, usage=0]], taskClsName=o.a.i.i.processors.cache.GridCacheAdapter$LoadCacheClosure,
sesId=e9f5bad7251-1edbab1e-37bf-424e-a9e1-0c866b95009d, startTime=1453807336874, endTime=9223372036854775807,
taskNodeId=1edbab1e-37bf-424e-a9e1-0c866b95009d, clsLdr=sun.misc.Launcher$AppClassLoader@15db9742,
closed=false, cpSpi=null, failSpi=null, loadSpi=null, usage=1, fullSup=false, subjId=1edbab1e-37bf-424e-a9e1-0c866b95009d,
mapFut=IgniteFuture [orig=GridFutureAdapter [resFlag=0, res=null, startTime=1453807336894,
endTime=0, ignoreInterrupts=false, lsnr=null, state=INIT]]], jobId=0af5bad7251-9f7af4ba-6a64-4de4-b5d2-81d59be05303]]
> java.lang.AssertionError: persistent-cache
> at org.apache.ignite.internal.processors.cache.GridCacheAdapter$LoadCacheClosure.call(GridCacheAdapter.java:5788)
> at org.apache.ignite.internal.processors.cache.GridCacheAdapter$LoadCacheClosure.call(GridCacheAdapter.java:5740)
> at org.apache.ignite.internal.processors.closure.GridClosureProcessor$C2.execute(GridClosureProcessor.java:1789)
> at org.apache.ignite.internal.processors.job.GridJobWorker$2.call(GridJobWorker.java:509)
> at org.apache.ignite.internal.util.IgniteUtils.wrapThreadLoader(IgniteUtils.java:6397)
> at org.apache.ignite.internal.processors.job.GridJobWorker.execute0(GridJobWorker.java:503)
> at org.apache.ignite.internal.processors.job.GridJobWorker.body(GridJobWorker.java:456)
> at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
> at org.apache.ignite.internal.processors.job.GridJobProcessor.processJobExecuteRequest(GridJobProcessor.java:1166)
> at org.apache.ignite.internal.processors.job.GridJobProcessor$JobExecutionListener.onMessage(GridJobProcessor.java:1770)
> at org.apache.ignite.internal.managers.communication.GridIoManager.processRegularMessage0(GridIoManager.java:821)
> at org.apache.ignite.internal.managers.communication.GridIoManager.access$1600(GridIoManager.java:103)
> at org.apache.ignite.internal.managers.communication.GridIoManager$5.run(GridIoManager.java:784)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> 9320 [Thread-19] INFO GridCacheProcessor - Started cache [name=persistent-cache, mode=REPLICATED]
> {noformat}
> For reference, here's the code that configures the cache:
> {noformat}
> CacheConfiguration<K, V> config = new CacheConfiguration<>("persistent-cache");
> config.setCacheMode(CacheMode.REPLICATED);
> config.setAtomicityMode(CacheAtomicityMode.TRANSACTIONAL);
> config.setRebalanceMode(CacheRebalanceMode.SYNC);
> config.setWriteSynchronizationMode(CacheWriteSynchronizationMode.FULL_SYNC);
> config.setStartSize(1024);
> config.setCacheStoreFactory(new LocalCacheStoreFactory(somepath));
> config.setWriteThrough(true);
> {noformat}



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