Hi,

I deployed a service from a client node to our grid using the following code:

IgniteCluster cluster = ignite.cluster();
ClusterGroup group = cluster.forAttribute(...);
Ignite.services(workerGroup).deployClusterSingleton("blaze/hsbc")

It is fine most of the time.  However we just encountered a case where we got 
an exception when some logic tried to use this service:

2018-08-02 16:27:57.713 processors.task.GridTaskWorker [sys-#29%mlog%] ERROR - 
Failed to obtain remote job result policy for result from 
ComputeTask.result(..) method (will fail the whole task): GridJobResultImpl 
[job=C2 [c=ServiceProxyCallable [mtdName=execute, svcName=blaze/hsbc, 
ignite=null]], sib=GridJobSiblingImpl 
[sesId=f66f54be461-65c907a3-8fcf-4ddd-acb1-6553be3d1dc9, 
jobId=076f54be461-65c907a3-8fcf-4ddd-acb1-6553be3d1dc9, 
nodeId=236a47e9-7fdb-464e-be44-b24d0942d75c, isJobDone=false], 
jobCtx=GridJobContextImpl 
[jobId=076f54be461-65c907a3-8fcf-4ddd-acb1-6553be3d1dc9, timeoutObj=null, 
attrs={}], node=TcpDiscoveryNode [id=236a47e9-7fdb-464e-be44-b24d0942d75c, 
addrs=[10.23.8.165], sockAddrs=[zhkdlp1712.int.clsa.com/10.23.8.165:0], 
discPort=0, order=37, intOrder=27, lastExchangeTime=1533148447088, loc=false, 
ver=2.3.0#20180518-sha1:02cf6abf, isClient=true], ex=class 
o.a.i.IgniteException: Service not found: blaze/hsbc, hasRes=true, 
isCancelled=false, isOccupied=true]
org.apache.ignite.IgniteException: Remote job threw user exception (override or 
implement ComputeTask.result(..) method if you would like to have automatic 
failover for this exception).
        at 
org.apache.ignite.compute.ComputeTaskAdapter.result(ComputeTaskAdapter.java:101)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.task.GridTaskWorker$5.apply(GridTaskWorker.java:1047)
 [liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.task.GridTaskWorker$5.apply(GridTaskWorker.java:1040)
 [liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.util.IgniteUtils.wrapThreadLoader(IgniteUtils.java:6663)
 [liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.task.GridTaskWorker.result(GridTaskWorker.java:1040)
 [liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.task.GridTaskWorker.onResponse(GridTaskWorker.java:858)
 [liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.task.GridTaskProcessor.processJobExecuteResponse(GridTaskProcessor.java:1066)
 [liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.task.GridTaskProcessor$JobMessageListener.onMessage(GridTaskProcessor.java:1301)
 [liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.managers.communication.GridIoManager.invokeListener(GridIoManager.java:1555)
 [liquid-logic.jar:2.0.10]
       at 
org.apache.ignite.internal.managers.communication.GridIoManager.processRegularMessage0(GridIoManager.java:1183)
 [liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.managers.communication.GridIoManager.access$4200(GridIoManager.java:126)
 [liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.managers.communication.GridIoManager$9.run(GridIoManager.java:1090)
 [liquid-logic.jar:2.0.10]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[?:1.8.0_121]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[?:1.8.0_121]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
Caused by: org.apache.ignite.IgniteException: Service not found: blaze/hsbc
        at 
org.apache.ignite.internal.processors.closure.GridClosureProcessor$C2.execute(GridClosureProcessor.java:1858)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.job.GridJobWorker$2.call(GridJobWorker.java:566)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.util.IgniteUtils.wrapThreadLoader(IgniteUtils.java:6631)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.job.GridJobWorker.execute0(GridJobWorker.java:560)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.job.GridJobWorker.body(GridJobWorker.java:489)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110) 
~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.job.GridJobProcessor.processJobExecuteRequest(GridJobProcessor.java:1181)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.job.GridJobProcessor$JobExecutionListener.onMessage(GridJobProcessor.java:1913)
 ~[liquid-logic.jar:2.0.10]
        ... 7 more
Caused by: 
org.apache.ignite.internal.processors.service.GridServiceNotFoundException: 
Service not found: blaze/hsbc
        at 
org.apache.ignite.internal.processors.service.GridServiceProxy$ServiceProxyCallable.call(GridServiceProxy.java:408)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.closure.GridClosureProcessor$C2.execute(GridClosureProcessor.java:1855)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.job.GridJobWorker$2.call(GridJobWorker.java:566)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.util.IgniteUtils.wrapThreadLoader(IgniteUtils.java:6631)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.job.GridJobWorker.execute0(GridJobWorker.java:560)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.job.GridJobWorker.body(GridJobWorker.java:489)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110) 
~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.job.GridJobProcessor.processJobExecuteRequest(GridJobProcessor.java:1181)
 ~[liquid-logic.jar:2.0.10]
        at 
org.apache.ignite.internal.processors.job.GridJobProcessor$JobExecutionListener.onMessage(GridJobProcessor.java:1913)
 ~[liquid-logic.jar:2.0.10]
        ... 7 more

And that's the end of my stack trace (nothing can be found after the ... 7 
more.)
The above exception got propagated back to the client which deployed the 
service.  Do you know of any reason for this to happen, like why a deployed 
service will disappear from the grid?  And is there any event I can use to 
detect this?

Thanks,
Calvin

Calvin KL Wong
Sr. Lead Engineer, Execution Services
D  +852 2600 7983  |  M  +852 9267 9471  |  T  +852 2600 8888
5/F, One Island East, 18 Westlands Road, Island East, Hong Kong

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