Hi Anjana, Sorry, I didn't notice that you have already replied this thread.
However, please consider my point on "getAllIndexedTables" as well. Thank you, Ayoma. On Wed, Dec 16, 2015 at 5:12 PM, Anjana Fernando <anj...@wso2.com> wrote: > Hi Sumedha, > > Thank you for reporting the issue. I've fixed the concurrent modification > exception issue, where, actually both the methods "addIndexedTable" and > "removeIndexedTable" needed to be synchronized, since they both work on the > shared Set object there. > > As for the OOM issue, can you please share a heap dump when the OOM > happened. So we can see what is causing this. And also, I see there are > multiple scripts running at the same time, so this actually can be a > legitimate error also, where the server actually doesn't have enough memory > to continue its operations. @Niranda, please share if there is any info on > tuning Spark's memory requirements. > > Cheers, > Anjana. > > On Wed, Dec 16, 2015 at 3:32 PM, Sumedha Rubasinghe <sume...@wso2.com> > wrote: > >> We have DAS Lite included in IoT Server and several summarisation scripts >> deployed. Server is going OOM frequently with following exception. >> >> Shouldn't this[1] method be synchronised? >> >> [1] >> https://github.com/wso2/carbon-analytics/blob/master/components/analytics-core/org.wso2.carbon.analytics.dataservice.core/src/main/java/org/wso2/carbon/analytics/dataservice/core/indexing/AnalyticsIndexedTableStore.java#L45 >> >> >> >>>>>>>>>>> >> [2015-12-16 15:11:00,004] INFO >> {org.wso2.carbon.analytics.spark.core.AnalyticsTask} - Executing the >> schedule task for: Light_Sensor_Script for tenant id: -1234 >> [2015-12-16 15:11:00,005] INFO >> {org.wso2.carbon.analytics.spark.core.AnalyticsTask} - Executing the >> schedule task for: Magnetic_Sensor_Script for tenant id: -1234 >> [2015-12-16 15:11:00,005] INFO >> {org.wso2.carbon.analytics.spark.core.AnalyticsTask} - Executing the >> schedule task for: Pressure_Sensor_Script for tenant id: -1234 >> [2015-12-16 15:11:00,006] INFO >> {org.wso2.carbon.analytics.spark.core.AnalyticsTask} - Executing the >> schedule task for: Proximity_Sensor_Script for tenant id: -1234 >> [2015-12-16 15:11:00,006] INFO >> {org.wso2.carbon.analytics.spark.core.AnalyticsTask} - Executing the >> schedule task for: Rotation_Sensor_Script for tenant id: -1234 >> [2015-12-16 15:11:00,007] INFO >> {org.wso2.carbon.analytics.spark.core.AnalyticsTask} - Executing the >> schedule task for: Temperature_Sensor_Script for tenant id: -1234 >> [2015-12-16 15:11:01,132] ERROR >> {org.wso2.carbon.ntask.core.impl.TaskQuartzJobAdapter} - Error in >> executing task: null >> java.util.ConcurrentModificationException >> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:922) >> at java.util.HashMap$KeyIterator.next(HashMap.java:956) >> at java.util.AbstractCollection.toArray(AbstractCollection.java:195) >> at >> org.wso2.carbon.analytics.dataservice.core.indexing.AnalyticsIndexedTableStore.refreshIndexedTableArray(AnalyticsIndexedTableStore.java:46) >> at >> org.wso2.carbon.analytics.dataservice.core.indexing.AnalyticsIndexedTableStore.addIndexedTable(AnalyticsIndexedTableStore.java:37) >> at >> org.wso2.carbon.analytics.dataservice.core.AnalyticsDataServiceImpl.refreshIndexedTableStoreEntry(AnalyticsDataServiceImpl.java:512) >> at >> org.wso2.carbon.analytics.dataservice.core.AnalyticsDataServiceImpl.invalidateAnalyticsTableInfo(AnalyticsDataServiceImpl.java:525) >> at >> org.wso2.carbon.analytics.dataservice.core.AnalyticsDataServiceImpl.checkAndInvalidateTableInfo(AnalyticsDataServiceImpl.java:504) >> at >> org.wso2.carbon.analytics.dataservice.core.AnalyticsDataServiceImpl.setTableSchema(AnalyticsDataServiceImpl.java:495) >> at >> org.wso2.carbon.analytics.spark.core.sources.AnalyticsRelation.insert(AnalyticsRelation.java:162) >> at >> org.apache.spark.sql.sources.InsertIntoDataSource.run(commands.scala:53) >> at >> org.apache.spark.sql.execution.ExecutedCommand.sideEffectResult$lzycompute(commands.scala:57) >> at >> org.apache.spark.sql.execution.ExecutedCommand.sideEffectResult(commands.scala:57) >> at >> org.apache.spark.sql.execution.ExecutedCommand.doExecute(commands.scala:68) >> at >> org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:88) >> at >> org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:88) >> at >> org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:147) >> at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:87) >> at >> org.apache.spark.sql.SQLContext$QueryExecution.toRdd$lzycompute(SQLContext.scala:950) >> at >> org.apache.spark.sql.SQLContext$QueryExecution.toRdd(SQLContext.scala:950) >> at org.apache.spark.sql.DataFrame.<init>(DataFrame.scala:144) >> at org.apache.spark.sql.DataFrame.<init>(DataFrame.scala:128) >> at org.apache.spark.sql.DataFrame$.apply(DataFrame.scala:51) >> at org.apache.spark.sql.SQLContext.sql(SQLContext.scala:755) >> at >> org.wso2.carbon.analytics.spark.core.internal.SparkAnalyticsExecutor.executeQueryLocal(SparkAnalyticsExecutor.java:710) >> at >> org.wso2.carbon.analytics.spark.core.internal.SparkAnalyticsExecutor.executeQuery(SparkAnalyticsExecutor.java:692) >> at >> org.wso2.carbon.analytics.spark.core.CarbonAnalyticsProcessorService.executeQuery(CarbonAnalyticsProcessorService.java:199) >> at >> org.wso2.carbon.analytics.spark.core.CarbonAnalyticsProcessorService.executeScript(CarbonAnalyticsProcessorService.java:149) >> at >> org.wso2.carbon.analytics.spark.core.AnalyticsTask.execute(AnalyticsTask.java:57) >> at >> org.wso2.carbon.ntask.core.impl.TaskQuartzJobAdapter.execute(TaskQuartzJobAdapter.java:67) >> at org.quartz.core.JobRunShell.run(JobRunShell.java:213) >> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) >> at java.util.concurrent.FutureTask.run(FutureTask.java:262) >> at >> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) >> at >> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) >> at java.lang.Thread.run(Thread.java:745) >> [2015-12-16 15:12:00,001] INFO >> {org.wso2.carbon.analytics.spark.core.AnalyticsTask} - Executing the >> schedule task for: Accelerometer_Sensor_Script for tenant id: -1234 >> >> -- >> /sumedha >> m: +94 773017743 >> b : bit.ly/sumedha >> > > > > -- > *Anjana Fernando* > Senior Technical Lead > WSO2 Inc. | http://wso2.com > lean . enterprise . middleware > > _______________________________________________ > Dev mailing list > Dev@wso2.org > http://wso2.org/cgi-bin/mailman/listinfo/dev > > -- Ayoma Wijethunga Software Engineer WSO2, Inc.; http://wso2.com lean.enterprise.middleware Mobile : +94 (0) 719428123 <+94+(0)+719428123> Blog : http://www.ayomaonline.com LinkedIn: https://www.linkedin.com/in/ayoma
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