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https://issues.apache.org/jira/browse/CASSANDRA-17252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17472985#comment-17472985
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Caleb Rackliffe commented on CASSANDRA-17252:
---------------------------------------------
+1 on both PRs, although the 3.0 PR seems to have {{trunk}} as its base.
Also, I'm not sure WTH is going on w/ the CircleCi runs:
https://app.circleci.com/pipelines/github/jonmeredith/cassandra/545/workflows/c06ad8f5-5a4d-42fe-a126-a3da09ca8149/jobs/2553
> 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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