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From "Chesnay Schepler (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (FLINK-8893) NPE when netty try to allocate directBuffer
Date Mon, 13 Aug 2018 07:38:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-8893?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chesnay Schepler closed FLINK-8893.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 1.6.0

Fixed by upgrading netty to 4.1.

> NPE when netty try to allocate directBuffer
> -------------------------------------------
>
>                 Key: FLINK-8893
>                 URL: https://issues.apache.org/jira/browse/FLINK-8893
>             Project: Flink
>          Issue Type: Bug
>          Components: Network
>    Affects Versions: 1.3.2
>            Reporter: aitozi
>            Priority: Blocker
>             Fix For: 1.6.0
>
>
> Job failed with this exception 
> {code:java}
> Caused by: java.lang.NullPointerException
>         at io.netty.buffer.PoolChunk.initBufWithSubpage(PoolChunk.java:381)
>         at io.netty.buffer.PoolChunk.initBufWithSubpage(PoolChunk.java:369)
>         at io.netty.buffer.PoolArena.allocate(PoolArena.java:194)
>         at io.netty.buffer.PoolArena.allocate(PoolArena.java:132)
>         at io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:271)
>         at io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:155)
>         at io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:146)
>         at org.apache.flink.runtime.io.network.netty.NettyBufferPool.directBuffer(NettyBufferPool.java:278)
>         at org.apache.flink.runtime.io.network.netty.NettyMessage.allocateBuffer(NettyMessage.java:72)
>         at org.apache.flink.runtime.io.network.netty.NettyMessage.access$000(NettyMessage.java:50)
>         at org.apache.flink.runtime.io.network.netty.NettyMessage$BufferResponse.write(NettyMessage.java:227)
>         ... 26 more
> {code}
> After research, this may be caused by allocate from muti-thread. 
> https://github.com/netty/netty/issues/4198
> https://github.com/netty/netty/pull/4388



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