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From "James Bench (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-1551) IgniteCache.put hangs indefinatly
Date Fri, 25 Sep 2015 14:53:04 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-1551?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

James Bench updated IGNITE-1551:
--------------------------------
    Description: 
We have a process that pulls jobs from a queue and puts associated assets into a cache using
IgniteCache.put.

The object we put into the cache is an object holding a map of Enums and byte arrays.
{code}
private Map<AssetTypeEnum, byte[]> assets = new EnumMap<>(AssetTypeEnum.class);
{code}
We are using a UUID as the key.

The byte arrays can become quite large - the batch it was processing when the issue occurred
were up to 30mb in size.

The thread got stuck in {code}IgniteCache.put{code} and remained stuck for a few hours until
we restarted Tomcat.

I took a memory Snapshot using YourKit while the application was frozen (https://onedrive.live.com/redir?resid=F06891F3AE093614!892&authkey=!AMfOdu7-jEtk_KA&ithint=file%2csnapshot)
which shows the thread {{taskExecutorBean-3}} waiting in sun.misc.Unsafe.park. It has spent
100% of the time I profiled here.

  was:
We have a process that pulls jobs from a queue and puts associated assets into a cache using
IgniteCache.put.

The object we put into the cache is an object holding a map of Enums and byte arrays.
{code}
private Map<AssetTypeEnum, byte[]> assets = new EnumMap<>(AssetTypeEnum.class);
{code}
We are using a UUID as the key.

The byte arrays can become quite large - the batch it was processing when the issue occurred
were up to 30mb in size.

The thread got stuck in {code}IgniteCache.put{code} and remained stuck for a few hours until
we restarted Tomcat.

I took a memory Snapshot using YourKit while the application was frozen (attached) which shows
the thread {{taskExecutorBean-3}} waiting in sun.misc.Unsafe.park. It has spent 100% of the
time I profiled here.


> IgniteCache.put hangs indefinatly
> ---------------------------------
>
>                 Key: IGNITE-1551
>                 URL: https://issues.apache.org/jira/browse/IGNITE-1551
>             Project: Ignite
>          Issue Type: Bug
>          Components: cache
>         Environment: Ubuntu 14.04
> java version "1.8.0_51"
> Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
> Java HotSpot(TM) 64-Bit Server VM (build 25.51-b03, mixed mode)
> Tomcat 7
>            Reporter: James Bench
>
> We have a process that pulls jobs from a queue and puts associated assets into a cache
using IgniteCache.put.
> The object we put into the cache is an object holding a map of Enums and byte arrays.
> {code}
> private Map<AssetTypeEnum, byte[]> assets = new EnumMap<>(AssetTypeEnum.class);
> {code}
> We are using a UUID as the key.
> The byte arrays can become quite large - the batch it was processing when the issue occurred
were up to 30mb in size.
> The thread got stuck in {code}IgniteCache.put{code} and remained stuck for a few hours
until we restarted Tomcat.
> I took a memory Snapshot using YourKit while the application was frozen (https://onedrive.live.com/redir?resid=F06891F3AE093614!892&authkey=!AMfOdu7-jEtk_KA&ithint=file%2csnapshot)
which shows the thread {{taskExecutorBean-3}} waiting in sun.misc.Unsafe.park. It has spent
100% of the time I profiled here.



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