[TAJO-821] IllegalStateException occurs when a NettyClientBase object is created within single thread.

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.9.0, 0.8.1
• Assignee: Hyoungjun Kim
• Reporter: Hyoungjun Kim
• Created: 09/May/14 17:29
• Updated: 20/May/14 08:39
• Resolved: 20/May/14 05:44

Description

When I created a TajoClient instance which uses a NettyClientBase on a TajoMaster's RPC handler, the following exception occurs.

    
java.lang.IllegalStateException: await*() in I/O thread causes a dead lock or sudden performance drop. Use addListener() instead or call await*() from a different thread.
at org.jboss.netty.channel.DefaultChannelFuture.checkDeadLock(DefaultChannelFuture.java:343)
at org.jboss.netty.channel.DefaultChannelFuture.await0(DefaultChannelFuture.java:307)
at org.jboss.netty.channel.DefaultChannelFuture.await(DefaultChannelFuture.java:248)
at com.cloudhopper.smpp.impl.DefaultSmppClient.createConnectedChannel(DefaultSmppClient.java:266)
at com.cloudhopper.smpp.impl.DefaultSmppClient.doOpen(DefaultSmppClient.java:216)
at com.cloudhopper.smpp.impl.DefaultSmppClient.bind(DefaultSmppClient.java:185)

There is some issues about this error in Netty 3.6. Check the following url.
https://community.jboss.org/thread/221243

This issue can be resolved by setting the deadLockChecker to false.

DefaultChannelFuture.setUseDeadLockChecker(false);

But this solution is to have a potential problem. So I suggest that NettyClientBase uses ChannelFutureListener.operationComplete() instead of awaitUninterruptibly()