Abhishek Rao created LIVY-453:
---------------------------------
Summary: Livy Exception while creating multiple sessions in
parallel
Key: LIVY-453
URL: https://issues.apache.org/jira/browse/LIVY-453
Project: Livy
Issue Type: Bug
Components: RSC
Affects Versions: 0.3
Reporter: Abhishek Rao
We're trying to create multiple livy sessions in parallel and then using them.
But when we try to create the sessions continuously, we're seeing that few
sessions are entering to dead state. We see the below exception in the logs.
18/02/27 10:30:20 WARN RSCClient: Client RPC channel closed unexpectedly.
18/02/27 10:30:20 WARN RSCClient: Error stopping RPC.
io.netty.util.concurrent.BlockingOperationException:
DefaultChannelPromise@7a828ea3(uncancellable)
at
io.netty.util.concurrent.DefaultPromise.checkDeadLock(DefaultPromise.java:390)
at
io.netty.channel.DefaultChannelPromise.checkDeadLock(DefaultChannelPromise.java:157)
at
io.netty.util.concurrent.DefaultPromise.await(DefaultPromise.java:251)
at
io.netty.channel.DefaultChannelPromise.await(DefaultChannelPromise.java:129)
at
io.netty.channel.DefaultChannelPromise.await(DefaultChannelPromise.java:28)
at
io.netty.util.concurrent.DefaultPromise.sync(DefaultPromise.java:218)
at
io.netty.channel.DefaultChannelPromise.sync(DefaultChannelPromise.java:117)
at
io.netty.channel.DefaultChannelPromise.sync(DefaultChannelPromise.java:28)
at com.cloudera.livy.rsc.rpc.Rpc.close(Rpc.java:307)
at com.cloudera.livy.rsc.RSCClient.stop(RSCClient.java:225)
at
com.cloudera.livy.rsc.RSCClient$2$1.onSuccess(RSCClient.java:122)
at
com.cloudera.livy.rsc.RSCClient$2$1.onSuccess(RSCClient.java:116)
at
com.cloudera.livy.rsc.Utils$2.operationComplete(Utils.java:108)
at
io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:680)
at
io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:567)
at
io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:406)
at
io.netty.channel.DefaultChannelPromise.trySuccess(DefaultChannelPromise.java:82)
at
io.netty.channel.AbstractChannel$CloseFuture.setClosed(AbstractChannel.java:956)
at
io.netty.channel.AbstractChannel$AbstractUnsafe.doClose0(AbstractChannel.java:608)
at
io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:586)
at
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.closeOnRead(AbstractNioByteChannel.java:71)
at
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:158)
at
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
at
io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111)
at java.lang.Thread.run(Thread.java:748)
18/02/27 10:30:20 DEBUG RSCClient: Disconnected from context
dad7c668-3c09-4ad2-9810-28f684c5ec49, shutdown = false.
However, when we create the sessions one after the other (Create session 1
after session 0 is in Idle state), it works fine.
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