[OAK-4058] Cold Standby intermittently throws RejectedExecutionException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.2.16, 1.4, 1.4.0
• Component/s: tarmk-standby
• Assignee: Francesco Mari
• Reporter: Francesco Mari
• Created: 25/Feb/16 09:14
• Updated: 07/Jun/16 17:42
• Resolved: 25/Feb/16 16:31

Description

The Cold Standby subsystem very frequently catches and logs RejectedExecutionException instances thrown by Netty. These exceptions are most likely caused by an incorrect usage of the thread pools allocated by Netty.

25.02.2016 09:23:02.517 *ERROR* [defaultEventExecutorGroup-1306-1] org.apache.jackrabbit.oak.plugins.segment.standby.client.SegmentLoaderHandler Exception caught, closing channel.
java.util.concurrent.RejectedExecutionException: event executor terminated
	at io.netty.util.concurrent.SingleThreadEventExecutor.reject(SingleThreadEventExecutor.java:745)
	at io.netty.util.concurrent.SingleThreadEventExecutor.addTask(SingleThreadEventExecutor.java:322)
	at io.netty.util.concurrent.SingleThreadEventExecutor.execute(SingleThreadEventExecutor.java:728)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:221)
	at io.netty.channel.ChannelInboundHandlerAdapter.channelInactive(ChannelInboundHandlerAdapter.java:75)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:233)
	at io.netty.channel.AbstractChannelHandlerContext.access$400(AbstractChannelHandlerContext.java:32)
	at io.netty.channel.AbstractChannelHandlerContext$5.run(AbstractChannelHandlerContext.java:224)
	at io.netty.util.concurrent.DefaultEventExecutor.run(DefaultEventExecutor.java:36)
	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
	at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
	at java.lang.Thread.run(Thread.java:745)