Artem Shutak created IGNITE-1823:
------------------------------------
Summary: Peer class loading can produce ClassCastException with
DeploymentMode.SHARED (default)
Key: IGNITE-1823
URL: https://issues.apache.org/jira/browse/IGNITE-1823
Project: Ignite
Issue Type: Bug
Reporter: Artem Shutak
Peer class loading can produce ClassCastException with DeploymentMode.SHARED
(default).
Steps to reproduce.
- Build Ignite under java 7.
- Run ignite.sh with default configuration and enabled peer class loading under
Java 8
- Run Test class under java8
- Run Test class under java8 again. On second run you will get
ClassCastException.
Looks like the issue is Ignite use different classloaders for first and second
run of Test (Task class deployed and undeployed each time).
{noformat}
[19:56:03,013][SEVERE][ignite-#18%sys-null%][GridTaskWorker] Failed to obtain
remote job result policy for result from ComputeTask.result(..) method (will
fail the whole task): GridJobResultImpl [job=C2 [], sib=GridJobSiblingImpl
[sesId=37a6da9b051-7d576228-e0e4-492c-a325-35ce4fc40ea0,
jobId=47a6da9b051-cadb35ba-9bc8-4f05-b9ce-03344883743f,
nodeId=cadb35ba-9bc8-4f05-b9ce-03344883743f, isJobDone=false],
jobCtx=GridJobContextImpl
[jobId=47a6da9b051-cadb35ba-9bc8-4f05-b9ce-03344883743f, timeoutObj=null,
attrs={}], node=TcpDiscoveryNode [id=cadb35ba-9bc8-4f05-b9ce-03344883743f,
addrs=[0:0:0:0:0:0:0:1%lo, 127.0.0.1, 192.168.1.159],
sockAddrs=[/192.168.1.159:47500, /0:0:0:0:0:0:0:1%lo:47500, /127.0.0.1:47500,
/192.168.1.159:47500], discPort=47500, order=1, intOrder=1,
lastExchangeTime=1446224162137, loc=false, ver=1.5.0#20151029-sha1:91059ba8,
isClient=false], ex=class o.a.i.IgniteException: mypackage.Task cannot be cast
to mypackage.Task, hasRes=true, isCancelled=false, isOccupied=true]
class 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)
at
org.apache.ignite.internal.processors.task.GridTaskWorker$3.apply(GridTaskWorker.java:903)
at
org.apache.ignite.internal.processors.task.GridTaskWorker$3.apply(GridTaskWorker.java:896)
at
org.apache.ignite.internal.util.IgniteUtils.wrapThreadLoader(IgniteUtils.java:6403)
at
org.apache.ignite.internal.processors.task.GridTaskWorker.result(GridTaskWorker.java:896)
at
org.apache.ignite.internal.processors.task.GridTaskWorker.onResponse(GridTaskWorker.java:792)
at
org.apache.ignite.internal.processors.task.GridTaskProcessor.processJobExecuteResponse(GridTaskProcessor.java:995)
at
org.apache.ignite.internal.processors.task.GridTaskProcessor$JobMessageListener.onMessage(GridTaskProcessor.java:1219)
at
org.apache.ignite.internal.managers.communication.GridIoManager.processRegularMessage0(GridIoManager.java:811)
at
org.apache.ignite.internal.managers.communication.GridIoManager.access$1500(GridIoManager.java:106)
at
org.apache.ignite.internal.managers.communication.GridIoManager$5.run(GridIoManager.java:774)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: class org.apache.ignite.IgniteException: mypackage.Task cannot be
cast to mypackage.Task
at
org.apache.ignite.internal.processors.closure.GridClosureProcessor$C2.execute(GridClosureProcessor.java:1792)
at
org.apache.ignite.internal.processors.job.GridJobWorker$2.call(GridJobWorker.java:509)
at
org.apache.ignite.internal.util.IgniteUtils.wrapThreadLoader(IgniteUtils.java:6371)
at
org.apache.ignite.internal.processors.job.GridJobWorker.execute0(GridJobWorker.java:503)
at
org.apache.ignite.internal.processors.job.GridJobWorker.body(GridJobWorker.java:456)
at
org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
at
org.apache.ignite.internal.processors.job.GridJobProcessor.processJobExecuteRequest(GridJobProcessor.java:1166)
at
org.apache.ignite.internal.processors.job.GridJobProcessor$JobExecutionListener.onMessage(GridJobProcessor.java:1776)
... 6 more
Caused by: java.lang.ClassCastException: mypackage.Task cannot be cast to
mypackage.Task
at mypackage.Test.lambda$main$cea8297e$1(Test.java:40)
at
org.apache.ignite.internal.processors.closure.GridClosureProcessor$C2.execute(GridClosureProcessor.java:1789)
... 13 more
[19:56:03] Ignite node stopped OK [uptime=00:00:00:371]
Exception in thread "main" class org.apache.ignite.IgniteException:
mypackage.Task cannot be cast to mypackage.Task
at
org.apache.ignite.internal.util.IgniteUtils.convertException(IgniteUtils.java:881)
at
org.apache.ignite.internal.IgniteComputeImpl.broadcast(IgniteComputeImpl.java:270)
at mypackage.Test.main(Test.java:28)
Caused by: class org.apache.ignite.IgniteCheckedException: mypackage.Task
cannot be cast to mypackage.Task
at
org.apache.ignite.internal.util.IgniteUtils.cast(IgniteUtils.java:6979)
at
org.apache.ignite.internal.util.future.GridFutureAdapter.get0(GridFutureAdapter.java:166)
at
org.apache.ignite.internal.util.future.GridFutureAdapter.get(GridFutureAdapter.java:115)
at
org.apache.ignite.internal.AsyncSupportAdapter.saveOrGet(AsyncSupportAdapter.java:112)
at
org.apache.ignite.internal.IgniteComputeImpl.broadcast(IgniteComputeImpl.java:267)
... 1 more
Caused by: java.lang.ClassCastException: mypackage.Task cannot be cast to
mypackage.Task
at mypackage.Test.lambda$main$cea8297e$1(Test.java:40)
at
org.apache.ignite.internal.processors.closure.GridClosureProcessor$C2.execute(GridClosureProcessor.java:1789)
at
org.apache.ignite.internal.processors.job.GridJobWorker$2.call(GridJobWorker.java:509)
at
org.apache.ignite.internal.util.IgniteUtils.wrapThreadLoader(IgniteUtils.java:6371)
at
org.apache.ignite.internal.processors.job.GridJobWorker.execute0(GridJobWorker.java:503)
at
org.apache.ignite.internal.processors.job.GridJobWorker.body(GridJobWorker.java:456)
at
org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:110)
at
org.apache.ignite.internal.processors.job.GridJobProcessor.processJobExecuteRequest(GridJobProcessor.java:1166)
at
org.apache.ignite.internal.processors.job.GridJobProcessor$JobExecutionListener.onMessage(GridJobProcessor.java:1776)
at
org.apache.ignite.internal.managers.communication.GridIoManager.processRegularMessage0(GridIoManager.java:811)
at
org.apache.ignite.internal.managers.communication.GridIoManager.access$1500(GridIoManager.java:106)
at
org.apache.ignite.internal.managers.communication.GridIoManager$5.run(GridIoManager.java:774)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{noformat}
Code of Test.
{code}
public class Task implements IgniteCallable<String> {
private static final long serialVersionUID = 1L;
@Override
public String call() throws Exception {
System.err.println("task called");
return InetAddress.getLocalHost().getHostName();
}
}
{code}
{code}
public class Test {
public static void main(String[] args) {
final IgniteConfiguration cfg = new IgniteConfiguration();
cfg.setPeerClassLoadingEnabled(true);
try (final Ignite ignite = Ignition.start(cfg)) {
final IgniteQueue<Task> queue = ignite.queue("myTaskQueue", 0, new
CollectionConfiguration());
queue.clear();
queue.addAll(Collections.nCopies(100, new Task()));
final IgniteCompute compute = ignite.compute();
final Collection<Collection<String>> res = compute.broadcast(() -> {
Ignite ign = Ignition.ignite();
final IgniteQueue<Task> q = ign.queue("myTaskQueue", 0, null);
final Collection<String> results = new ArrayList<>();
Object task = q.poll();
ign.log().info(">>>>> Class of task: " + task.getClass());
for (; task != null; ) {
results.add(((Task)task).call());
task = q.poll();
}
return results;
});
System.out.println(res);
}
}
}
{code}
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