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From Juan Barani <Juan.Bar...@unitedplanet.com>
Subject RE: How to correctly shut down Ignite Application
Date Wed, 10 May 2017 10:01:32 GMT
Hi,

Not necessarily is the case that the client cannot connect to the server. I experienced yesterday
with ignite 2.0, that when a client is forced with:

l_discoverySpi.setForceServerMode(true);

it comes as isClient=false in the exception message, even if setClientMode=true.

Since updating to 2.0, we experienced random NPEs when publishing a message in a topic during
the interval a server went down, but failed to notify other nodes due to a hard stop =>

ERROR 2017-05-10T09:57:58,282 - de.uplanet.test.integration.RemoteTestServiceBean[pool-4-thread-1]
Failed to send message to remote node: TcpDiscoveryNode [id=ef626cb1-3880-418e-a9d1-68fd692771fd,
addrs=[0:0:0:0:0:0:0:1%lo, 10.0.2.15, 127.0.0.1, 172.17.0.1], sockAddrs=[/172.17.0.1:0, 0:0:0:0:0:0:0:1%lo:0,
/127.0.0.1:0, /10.0.2.15:0], discPort=0, order=3, intOrder=3, lastExchangeTime=1494410235152,
loc=false, ver=2.0.0#20170430-sha1:d4eef3c6, isClient=true]
org.apache.ignite.spi.IgniteSpiException: Failed to send message to remote node: TcpDiscoveryNode
[id=ef626cb1-3880-418e-a9d1-68fd692771fd, addrs=[0:0:0:0:0:0:0:1%lo, 10.0.2.15, 127.0.0.1,
172.17.0.1], sockAddrs=[/172.17.0.1:0, 0:0:0:0:0:0:0:1%lo:0, /127.0.0.1:0, /10.0.2.15:0],
discPort=0, order=3, intOrder=3, lastExchangeTime=1494410235152, loc=false, ver=2.0.0#20170430-sha1:d4eef3c6,
isClient=true]
                at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi.sendMessage0(TcpCommunicationSpi.java:2483)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi.sendMessage(TcpCommunicationSpi.java:2419)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.internal.managers.communication.GridIoManager.send(GridIoManager.java:1329)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.internal.managers.communication.GridIoManager.send(GridIoManager.java:1698)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.internal.managers.communication.GridIoManager.sendOrderedMessageToGridTopic(GridIoManager.java:1473)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.internal.managers.communication.GridIoManager.sendUserMessage(GridIoManager.java:1588)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.internal.IgniteMessagingImpl.sendOrdered(IgniteMessagingImpl.java:165)
~[ignite-core-2.0.0.jar:2.0.0]
                at de.uplanet.lucy.server.distributed.cloud.datagrid.ignite.IgniteGridTopic.publish(IgniteGridTopic.java:58)
~[update/:?]
                at de.uplanet.test.integration.RemoteTestServiceBean.lambda$3(RemoteTestServiceBean.java:123)
~[update/:?]
                at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[?:1.8.0_92]
                at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_92]
                at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[?:1.8.0_92]
                at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[?:1.8.0_92]
                at java.lang.Thread.run(Thread.java:745) [?:1.8.0_92]
Caused by: org.apache.ignite.IgniteCheckedException: java.lang.NullPointerException
                at org.apache.ignite.internal.util.IgniteUtils.cast(IgniteUtils.java:7242)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.internal.util.future.GridFutureAdapter.resolve(GridFutureAdapter.java:258)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.internal.util.future.GridFutureAdapter.get0(GridFutureAdapter.java:170)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.internal.util.future.GridFutureAdapter.get(GridFutureAdapter.java:139)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi.reserveClient(TcpCommunicationSpi.java:2630)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi.sendMessage0(TcpCommunicationSpi.java:2455)
~[ignite-core-2.0.0.jar:2.0.0]
                ... 13 more
Caused by: java.util.concurrent.ExecutionException: java.lang.NullPointerException
                at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_92]
                at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_92]
                at org.apache.ignite.internal.util.IgniteUtils.filterReachable(IgniteUtils.java:1895)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi.createTcpClient(TcpCommunicationSpi.java:2891)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi.createNioClient(TcpCommunicationSpi.java:2702)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi.reserveClient(TcpCommunicationSpi.java:2594)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi.sendMessage0(TcpCommunicationSpi.java:2455)
~[ignite-core-2.0.0.jar:2.0.0]
                ... 13 more
Caused by: java.lang.NullPointerException
                at org.apache.ignite.internal.util.IgniteUtils.reachable(IgniteUtils.java:2102)
~[ignite-core-2.0.0.jar:2.0.0]
                at org.apache.ignite.internal.util.IgniteUtils$18.run(IgniteUtils.java:1884)
~[ignite-core-2.0.0.jar:2.0.0]
                ... 5 more

These errors disappeared after setting: -Djava.net.preferIPv4Stack=true

I came under the impression that something is working different under ipv4 and ipv6, but cannot
tell why the NPE was coming.

Probably the errors are related.

Thanks!

Juan

From: Andrey Mashenkov [mailto:andrey.mashenkov@gmail.com]
Sent: Tuesday, May 9, 2017 7:49 PM
To: user@ignite.apache.org
Subject: Re: How to correctly shut down Ignite Application

Looks like client node can't connect to server
[id=2b404f04-cad5-4209-a615-ab3b9639b8e4, addrs=[0:0:0:0:0:0:0:1%1,
127.0.0.1, 172.30.32.89].. isClient=false]

Would you please attach full logs?

On Tue, May 9, 2017 at 2:55 AM, baozipu <job.lei.zhang@gmail.com<mailto:job.lei.zhang@gmail.com>>
wrote:
Hi,

Thanks for the reply. Both the applications are launched in Embedded mode in
Spark. I am not sure if the flag of preferIPv4Stack still matters.

Both of the applications runs perfect when they are alive. It is only when
the "client application" (actually another application in server mode)
closed, exit from the topology, that those error messages pop up.

I couldn't understand why the server application reports such error. It
should be normal that some connections disconnected....

Could you give me more detail for diagnosing the problem?



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--
Best regards,
Andrey V. Mashenkov
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