High CPU in InternalNioOutputBuffer.sendAck
Issue
- We see high CPU in threads like the following:
sun.nio.ch.WindowsAsynchronousSocketChannelImpl.write0 line: not available [native method]
sun.nio.ch.WindowsAsynchronousSocketChannelImpl.access$900 line: 43
sun.nio.ch.WindowsAsynchronousSocketChannelImpl$WriteTask.run line: 778
sun.nio.ch.WindowsAsynchronousSocketChannelImpl.implWrite line: 916
sun.nio.ch.AsynchronousSocketChannelImpl.write line: 382
sun.nio.ch.AsynchronousSocketChannelImpl.write line: 387
org.apache.tomcat.util.net.NioChannel.writeBytes line: 919
org.apache.coyote.http11.InternalNioOutputBuffer.blockingWrite line: 314
org.apache.coyote.http11.InternalNioOutputBuffer.sendAck line: 352
Environment
- JBoss Enterprise Application Platform (EAP) 6.x
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