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https://issues.apache.org/jira/browse/CASSANDRA-17252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jon Meredith updated CASSANDRA-17252:
-------------------------------------
Bug Category: Parent values: Degradation(12984)Level 1 values: Resource
Management(12995)
Complexity: Normal
Component/s: Messaging/Client
Discovered By: User Report
Fix Version/s: 3.0.x
3.11.x
4.0.x
4.x
Severity: Low
Assignee: Jon Meredith
Status: Open (was: Triage Needed)
Looks like the issue was present since
initial commit in CASSANDRA-8086 / e56d9efb7c1 , but perhaps Netty behaved
differently pre-tcnative.
> ConnectionLimitHandler may leaks connection count if remote connection drops
> ----------------------------------------------------------------------------
>
> Key: CASSANDRA-17252
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17252
> Project: Cassandra
> Issue Type: Bug
> Components: Messaging/Client
> Reporter: Jon Meredith
> Assignee: Jon Meredith
> Priority: Normal
> Fix For: 3.0.x, 3.11.x, 4.0.x, 4.x
>
>
> In some cases, Netty does not return the original IP used for per-IP counting
> when the channel becomes inactive,
> which throws an NPE before decrementing the active per-IP count.
> {code:java}
> java.lang.NullPointerException
> at
> org.apache.cassandra.transport.ConnectionLimitHandler.channelInactive(ConnectionLimitHandler.java:101)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
> at
> io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:389)
> at
> io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:354)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
> at
> io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1405)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
> at
> io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:901)
> at
> io.netty.channel.AbstractChannel$AbstractUnsafe$8.run(AbstractChannel.java:819)
> at
> io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
> at
> io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:497)
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
> at
> io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> at
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> at java.base/java.lang.Thread.run(Thread.java:834)
> {code}
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