```
java.lang.NullPointerException: null
at
org.apache.pulsar.functions.worker.scheduler.RoundRobinScheduler.schedule(RoundRobinScheduler.java:46)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at
org.apache.pulsar.functions.worker.SchedulerManager.invokeScheduler(SchedulerManager.java:208)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at
org.apache.pulsar.functions.worker.SchedulerManager.lambda$schedule$0(SchedulerManager.java:139)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[?:1.8.0_181]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_181]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
[?:1.8.0_181]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
[?:1.8.0_181]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_181]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:1.8.0_181]
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
[io.netty-netty-all-4.1.22.Final.jar:4.1.22.Final]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
00:14:32.907 [pulsar-web-30-17] INFO org.eclipse.jetty.server.RequestLog -
127.0.0.1 - - [08/Oct/2018:00:14:32 +0000] "GET
//127.0.0.1:8080/admin/v2/persistent/public/functions/coordinate/stats
HTTP/1.1" 200 1500 "-" "Jersey/2.25 (HttpUrlConnection 1.8.0_181)" 1
00:14:32.907 [pulsar-worker-2-5] WARN
org.apache.pulsar.functions.worker.SchedulerManager - Failed to invoke scheduler
java.lang.NullPointerException: null
at
org.apache.pulsar.functions.worker.scheduler.RoundRobinScheduler.schedule(RoundRobinScheduler.java:46)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at
org.apache.pulsar.functions.worker.SchedulerManager.invokeScheduler(SchedulerManager.java:208)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at
org.apache.pulsar.functions.worker.SchedulerManager.lambda$schedule$0(SchedulerManager.java:139)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[?:1.8.0_181]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_181]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
[?:1.8.0_181]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
[?:1.8.0_181]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_181]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:1.8.0_181]
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
[io.netty-netty-all-4.1.22.Final.jar:4.1.22.Final]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
00:14:32.907 [pulsar-web-30-20] INFO org.eclipse.jetty.server.RequestLog -
127.0.0.1 - - [08/Oct/2018:00:14:32 +0000] "GET
//127.0.0.1:8080/admin/v2/persistent/public/functions/coordinate/stats
HTTP/1.1" 200 1500 "-" "Jersey/2.25 (HttpUrlConnection 1.8.0_181)" 0
00:14:32.907 [pulsar-worker-2-5] WARN
org.apache.pulsar.functions.worker.SchedulerManager - Failed to invoke scheduler
java.lang.NullPointerException: null
at
org.apache.pulsar.functions.worker.scheduler.RoundRobinScheduler.schedule(RoundRobinScheduler.java:46)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at
org.apache.pulsar.functions.worker.SchedulerManager.invokeScheduler(SchedulerManager.java:208)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at
org.apache.pulsar.functions.worker.SchedulerManager.lambda$schedule$0(SchedulerManager.java:139)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[?:1.8.0_181]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_181]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
[?:1.8.0_181]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
[?:1.8.0_181]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_181]
at java.util.concurrent.ThreadPoolExecutor$Worker^C8.jar:2.2.0-SNAPSHOT]
at
org.apache.pulsar.functions.worker.SchedulerManager.lambda$schedule$0(SchedulerManager.java:139)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[?:1.8.0_181]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_181]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
[?:1.8.0_181]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
[?:1.8.0_181]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_181]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:1.8.0_181]
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
[io.netty-netty-all-4.1.22.Final.jar:4.1.22.Final]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
00:14:32.908 [pulsar-web-30-23] INFO org.eclipse.jetty.server.RequestLog -
127.0.0.1 - - [08/Oct/2018:00:14:32 +0000] "GET
//127.0.0.1:8080/admin/v2/persistent/public/functions/coordinate/stats
HTTP/1.1" 200 1500 "-" "Jersey/2.25 (HttpUrlConnection 1.8.0_181)" 0
00:14:32.908 [pulsar-worker-2-5] WARN
org.apache.pulsar.functions.worker.SchedulerManager - Failed to invoke scheduler
java.lang.NullPointerException: null
at
org.apache.pulsar.functions.worker.scheduler.RoundRobinScheduler.schedule(RoundRobinScheduler.java:46)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at
org.apache.pulsar.functions.worker.SchedulerManager.invokeScheduler(SchedulerManager.java:208)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at
org.apache.pulsar.functions.worker.SchedulerManager.lambda$schedule$0(SchedulerManager.java:139)
~[org.apache.pulsar-pulsar-functions-worker-2.2.0-SNAPSHOT.jar:2.2.0-SNAPSHOT]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[?:1.8.0_181]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_181]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
[?:1.8.0_181]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
[?:1.8.0_181]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_181]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:1.8.0_181]
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
[io.netty-netty-all-4.1.22.Final.jar:4.1.22.Final]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
```
[ Full content available at: https://github.com/apache/pulsar/issues/2743 ]
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