[L2switch-dev] Reg: ODL beryllium controller throw java error "Exception in thread "odl-stat-collector-46-thread-0" with mininet(spine-leaf.py).

Wed, 22 Jun 2016 22:10:30 -0700 

Hello,

Good day to you.
I am benchmarking the "*Network Discovery Size*" of ODL beryllium controller for spine-leaf topology using "*spine-leaf.py*" in mininet.
Reference link: https://github.com/ciena/mininet-topos/blob/master/spine_leaf.py 
Mininet version : 2.2.1rc1
I created *1800* switch in spine-leaf.py in mininet but it's throwing error message as following, 

Traceback (most recent call last):
  File "./spine_leaf.py", line 157, in <module>
    simpleTest(options)
  File "./spine_leaf.py", line 129, in simpleTest
    net.start()
  File "build/bdist.linux-x86_64/egg/mininet/net.py", line 495, in start
File "build/bdist.linux-x86_64/egg/mininet/node.py", line 1207, in batchStartup 
  File "build/bdist.linux-x86_64/egg/mininet/util.py", line 82, in errRun
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1335, in _execute_child
    raise child_exception
OSError: [Errno 7] Argument list too long
*Note*: The *spine-leaf.py* does not throw any error message upto 1720 switch's creation.
After the above error message in mininet, the opendaylight controller also throw the following java error,
Exception in thread "odl-stat-collector-36-thread-0" Exception in thread "odl-stat-collector-51-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "odl-stat-collector-50-thread-0" Exception in thread "odl-stat-collector-42-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "odl-stat-collector-35-thread-0" Exception in thread "odl-stat-collector-38-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "odl-stat-collector-47-thread-0" Exception in thread "odl-stat-collector-37-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "odl-stat-collector-46-thread-0" Exception in thread "odl-stat-collector-26-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "odl-stat-collector-48-thread-0" Exception in thread "odl-stat-collector-40-thread-0" Exception in thread "odl-stat-collector-29-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "odl-stat-collector-30-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "odl-stat-collector-21-thread-0" Exception in thread "odl-stat-collector-16-thread-0" Exception in thread "odl-stat-collector-24-thread-0" Exception in thread "odl-stat-collector-18-thread-0" Exception in thread "odl-stat-collector-17-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "odl-stat-collector-15-thread-0" Exception in thread "odl-stat-collector-19-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "odl-stat-collector-14-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
Exception in thread "odl-stat-collector-13-thread-0" java.lang.NullPointerException at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.isThisInstanceNodeOwner(StatPermCollectorImpl.java:333) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.collectStatCrossNetwork(StatPermCollectorImpl.java:266) at org.opendaylight.openflowplugin.applications.statistics.manager.impl.StatPermCollectorImpl.run(StatPermCollectorImpl.java:221) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
        at java.lang.Thread.run(Thread.java:745)
After the above java error, every time the opendaylight controller throw the same error message during the "shutdown/logout" even though we did controller PC manual reboot and controller reinstall.
Could you please clarify whether this is known issue for spine-leaf topology with beryllium controller? 

Let me know if you need any more information.


Thanks and Regards,
Selvakumar Murugasekaran.

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