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https://issues.apache.org/jira/browse/FELIX-810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martin Thelian updated FELIX-810:
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Attachment: FELIX-810.patch
Here is a patch to fix this issue.
> MonitorAdmin - NullPointerException while calling MonitoringJob.stop()
> -----------------------------------------------------------------------
>
> Key: FELIX-810
> URL: https://issues.apache.org/jira/browse/FELIX-810
> Project: Felix
> Issue Type: Bug
> Components: Sandbox
> Reporter: Martin Thelian
> Attachments: FELIX-810.patch
>
>
> I've started a scheduled job with:
> |> this.monitorService.startScheduledJob(
> |> PID, // listener.id
> |> variableNames.toArray(new String[variableNames.size()]),
> |> 60, // seconds
> |> 0 // Forever
> |> );
> If I then need to stop the job via
> |> this.currentMonitorJob.stop();
> e.g. because the variableName list has changed I'm getting the following
> NullpointerException:
> -----
> |> java.lang.NullPointerException
> |> at
> org.apache.felix.sandbox.monitor.MonitorAdminImpl$MonitoringJobImpl.unsubscribeStatusVariables(MonitorAdminImpl.java:185)
> |> at
> org.apache.felix.sandbox.monitor.MonitorAdminImpl$MonitoringJobImpl.stop(MonitorAdminImpl.java:162)
> -----
> The problem seems to be that there are no subscriptions in a scheduled job
> and therefore the variable "list" shown in the code fragment below is null.
> |> private void unsubscribeStatusVariables() {
> |> [...]
> |> List list=(List)subscriptions.get(statusVariableName);
> |> if(list!=null) {
> |> list.remove(this);
> |> } // else never occurs
> |> if(list.isEmpty())
> |> subscriptions.remove(statusVariableName);
> |> }
> |> }
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