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https://issues.apache.org/jira/browse/HBASE-26708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17527894#comment-17527894
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Viraj Jasani commented on HBASE-26708:
--------------------------------------
Hello [~elserj],
{quote}did you ever get to the bottom of this one?
{quote}
{quote} * leakDetection=advanced gave similar looking allocators/usages that
Viraj shared{quote}
As per the advanced leak detection mode, I never saw any leaks coming from
hbase as such, they are coming from netty only.
Here are few more observations, the leaks occur only for:
# nodes with less memory available (e.g. 64 GB vs 128 GB with ~8-10 M rps)
# cloud infra without any colocation of datanode and regionserver k8s pods
(pods sharing different nodes)
Also, I keep seeing GC logs coming from netty which makes it look like leaked
buffers are getting garbage collected but only when GC can't keep up with ever
increasing leaks, we see hanging state where NettyRPCServer is no longer able
to process any more RPC requests.
The only resolution I see so far is to increase direct memory (e.g.
-XX:MaxDirectMemorySize=55G for 64G total memory pod) until Netty's leaked
ByteBuff issue is resolved or GC is able to catch up with the higher leak rate
(with increasing RPC requests).
> Netty Leak detected and eventually results in OutOfDirectMemoryError
> --------------------------------------------------------------------
>
> Key: HBASE-26708
> URL: https://issues.apache.org/jira/browse/HBASE-26708
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.4.6
> Reporter: Viraj Jasani
> Priority: Major
> Fix For: 2.5.0, 3.0.0-alpha-3, 2.4.12
>
>
> Under constant data ingestion, using default Netty based RpcServer and
> RpcClient implementation results in OutOfDirectMemoryError, supposedly caused
> by leaks detected by Netty's LeakDetector.
> {code:java}
> 2022-01-25 17:03:10,084 ERROR [S-EventLoopGroup-1-3]
> util.ResourceLeakDetector - java:115)
>
> org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.expandCumulation(ByteToMessageDecoder.java:538)
>
> org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder$1.cumulate(ByteToMessageDecoder.java:97)
>
> org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:274)
>
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
>
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
>
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
>
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
>
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
>
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
>
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
>
> org.apache.hbase.thirdparty.io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:795)
>
> org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:480)
>
> org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
>
> org.apache.hbase.thirdparty.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
>
> org.apache.hbase.thirdparty.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
>
> org.apache.hbase.thirdparty.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> java.lang.Thread.run(Thread.java:748)
> {code}
> {code:java}
> 2022-01-25 17:03:14,014 ERROR [S-EventLoopGroup-1-3]
> util.ResourceLeakDetector -
> apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:507)
>
> org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:446)
>
> org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
>
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
>
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
>
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
>
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
>
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
>
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
>
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
>
> org.apache.hbase.thirdparty.io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:795)
>
> org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:480)
>
> org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
>
> org.apache.hbase.thirdparty.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
>
> org.apache.hbase.thirdparty.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
>
> org.apache.hbase.thirdparty.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> java.lang.Thread.run(Thread.java:748)
> {code}
> And finally handlers are removed from the pipeline due to
> OutOfDirectMemoryError:
> {code:java}
> 2022-01-25 17:36:28,657 WARN [S-EventLoopGroup-1-5]
> channel.DefaultChannelPipeline - An exceptionCaught() event was fired, and it
> reached at the tail of the pipeline. It usually means the last handler in the
> pipeline did not handle the exception.
> org.apache.hbase.thirdparty.io.netty.channel.ChannelPipelineException:
> org.apache.hadoop.hbase.security.NettyHBaseSaslRpcClientHandler.handlerAdded()
> has thrown an exception; removed.
> at
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline.callHandlerAdded0(DefaultChannelPipeline.java:624)
> at
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline.addFirst(DefaultChannelPipeline.java:181)
> at
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline.addFirst(DefaultChannelPipeline.java:358)
> at
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline.addFirst(DefaultChannelPipeline.java:339)
> at
> org.apache.hadoop.hbase.ipc.NettyRpcConnection.saslNegotiate(NettyRpcConnection.java:229)
> at
> org.apache.hadoop.hbase.ipc.NettyRpcConnection.access$600(NettyRpcConnection.java:79)
> at
> org.apache.hadoop.hbase.ipc.NettyRpcConnection$2.operationComplete(NettyRpcConnection.java:312)
> at
> org.apache.hadoop.hbase.ipc.NettyRpcConnection$2.operationComplete(NettyRpcConnection.java:300)
> at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578)
> at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571)
> at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550)
> at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491)
> at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616)
> at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:605)
> at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:104)
> at
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPromise.trySuccess(DefaultChannelPromise.java:84)
> at
> org.apache.hbase.thirdparty.io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.fulfillConnectPromise(AbstractEpollChannel.java:653)
> at
> org.apache.hbase.thirdparty.io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.finishConnect(AbstractEpollChannel.java:691)
> at
> org.apache.hbase.thirdparty.io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.epollOutReady(AbstractEpollChannel.java:567)
> at
> org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:470)
> at
> org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
> at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
> at
> org.apache.hbase.thirdparty.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> at java.lang.Thread.run(Thread.java:748)
> Caused by:
> org.apache.hbase.thirdparty.io.netty.util.internal.OutOfDirectMemoryError:
> failed to allocate 16777216 byte(s) of direct memory (used: 33269220801, max:
> 33285996544)
> at
> org.apache.hbase.thirdparty.io.netty.util.internal.PlatformDependent.incrementMemoryCounter(PlatformDependent.java:802)
> at
> org.apache.hbase.thirdparty.io.netty.util.internal.PlatformDependent.allocateDirectNoCleaner(PlatformDependent.java:731)
> at
> org.apache.hbase.thirdparty.io.netty.buffer.PoolArena$DirectArena.allocateDirect(PoolArena.java:632)
> at
> org.apache.hbase.thirdparty.io.netty.buffer.PoolArena$DirectArena.newChunk(PoolArena.java:607)
> at
> org.apache.hbase.thirdparty.io.netty.buffer.PoolArena.allocateNormal(PoolArena.java:202)
> at
> org.apache.hbase.thirdparty.io.netty.buffer.PoolArena.tcacheAllocateSmall(PoolArena.java:172)
> at
> org.apache.hbase.thirdparty.io.netty.buffer.PoolArena.allocate(PoolArena.java:134)
> at
> org.apache.hbase.thirdparty.io.netty.buffer.PoolArena.allocate(PoolArena.java:126)
> at
> org.apache.hbase.thirdparty.io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:395)
> at
> org.apache.hbase.thirdparty.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:187)
> at
> org.apache.hbase.thirdparty.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:178)
> at
> org.apache.hbase.thirdparty.io.netty.buffer.AbstractByteBufAllocator.buffer(AbstractByteBufAllocator.java:115)
> at
> org.apache.hadoop.hbase.security.NettyHBaseSaslRpcClientHandler.writeResponse(NettyHBaseSaslRpcClientHandler.java:79)
> at
> org.apache.hadoop.hbase.security.NettyHBaseSaslRpcClientHandler.handlerAdded(NettyHBaseSaslRpcClientHandler.java:115)
> at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.callHandlerAdded(AbstractChannelHandlerContext.java:938)
> at
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline.callHandlerAdded0(DefaultChannelPipeline.java:609)
> ... 24 more
> {code}
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