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https://issues.apache.org/jira/browse/STREAMS-223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Steve Blackmon updated STREAMS-223:
-----------------------------------
Priority: Minor (was: Major)
> streams-monitoring exception when streamConfig not set
> ------------------------------------------------------
>
> Key: STREAMS-223
> URL: https://issues.apache.org/jira/browse/STREAMS-223
> Project: Streams
> Issue Type: Bug
> Reporter: Steve Blackmon
> Priority: Minor
>
> LocalStreamBuilder supports a default execution even when streamConfig is
> empty/null
> StreamBuilder builder = new LocalStreamBuilder(100);
> streams-monitoring throws an exception and does not run when no config is
> supplied.
> 00:31:21.762 [main] ERROR o.a.s.m.tasks.BroadcastMonitorThread - Exception
> while trying to set default broadcast thread wait time: {}
> java.lang.NullPointerException: null
> at
> org.apache.streams.monitoring.tasks.BroadcastMonitorThread.setWaitTime(BroadcastMonitorThread.java:144)
> [classes/:na]
> at
> org.apache.streams.monitoring.tasks.BroadcastMonitorThread.<init>(BroadcastMonitorThread.java:58)
> [classes/:na]
> at
> org.apache.streams.local.builders.LocalStreamBuilder.<init>(LocalStreamBuilder.java:114)
> [classes/:na]
> at
> org.apache.streams.local.builders.LocalStreamBuilder.<init>(LocalStreamBuilder.java:89)
> [classes/:na]
> at
> org.apache.streams.twitter.example.TwitterUserstreamConsole.main(TwitterUserstreamConsole.java:49)
> [classes/:na]
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> ~[na:1.8.0_20]
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> ~[na:1.8.0_20]
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> ~[na:1.8.0_20]
> at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_20]
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
> [idea_rt.jar:na]
> 00:31:21.773 [main] DEBUG o.a.s.l.builders.LocalStreamBuilder - Attaching
> shutdown handler
> The workaround is to supply a config like this:
> Map<String, Object> streamConfig = Maps.newHashMap();
> streamConfig.put(LocalStreamBuilder.TIMEOUT_KEY, 20 * 60 * 1000);
> streamConfig.put("monitoring_broadcast_interval_ms", -1);
> StreamBuilder builder = new LocalStreamBuilder(100, streamConfig);
> But that should not be necessary.
> Establish documented defaults for this capability, ensure no exceptions occur
> in the default state, and do not require explicit action by the
> implementation to use the default.
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