# hipchat-client-io exception ERROR entries in log

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## Symptoms

The following appears in the atlassian-confluence.log:

2014-10-05 20:16:41,725 hipchat-client-io:thread-3 ERROR      [http.nio.protocol.HttpAsyncRequestExecutor]
http-outgoing-133 [CLOSED] HTTP protocol exception: null
java.nio.channels.ClosedChannelException
at org.apache.http.impl.nio.reactor.BaseIOReactor.validate(BaseIOReactor.java:220)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:284)
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:106)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor\$Worker.run(AbstractMultiworkerIOReactor.java:604)


## Diagnosis

Multiple entries exist in the log.

## Resolution

The Confluence plugin cache needs to be cleared. Please refer to this article for instructions on how to do this.

## Cause

From Oracle documentation:

"Checked exception thrown when an attempt is made to invoke or complete an I/O operation upon channel that is closed, or at least closed to that operation. That this exception is thrown does not necessarily imply that the channel is completely closed. A socket channel whose write half has been shut down, for example, may still be open for reading."