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java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[?:1.7.0_79] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)[?:1.7.0_79] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[?:1.7.0_79] at java.lang.reflect.Method.invoke(Method.java:606)[?:1.7.0_79] at com.metamx.common.lifecycle.Lifecycle$AnnotationBasedHandler.start(Lifecycle.java:350)[java-util-0.27.9.jar:?] at com.metamx.common.lifecycle.Lifecycle.start(Lifecycle.java:259)[java-util-0.27.9.jar:?] at io.druid.indexing.overlord.TaskMaster$1.takeLeadership(TaskMaster.java:141)[druid-indexing-service-0.9.1.1.jar:0.9.1.1] at org.apache.curator.framework.recipes.leader.LeaderSelector$WrappedListener.takeLeadership(LeaderSelector.java:534)[curator-recipes-2.10.0.jar:?] at org.apache.curator.framework.recipes.leader.LeaderSelector.doWork(LeaderSelector.java:399)[curator-recipes-2.10.0.jar:?] at org.apache.curator.framework.recipes.leader.LeaderSelector.doWorkLoop(LeaderSelector.java:441)[curator-recipes-2.10.0.jar:?] at org.apache.curator.framework.recipes.leader.LeaderSelector.access$100(LeaderSelector.java:64)[curator-recipes-2.10.0.jar:?] at org.apache.curator.framework.recipes.leader.LeaderSelector$2.call(LeaderSelector.java:245)[curator-recipes-2.10.0.jar:?] at org.apache.curator.framework.recipes.leader.LeaderSelector$2.call(LeaderSelector.java:239)[curator-recipes-2.10.0.jar:?] at java.util.concurrent.FutureTask.run(FutureTask.java:262)[?:1.7.0_79] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)[?:1.7.0_79] at java.util.concurrent.FutureTask.run(FutureTask.java:262)[?:1.7.0_79] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[?:1.7.0_79] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)[?:1.7.0_79] at java.lang.Thread.run(Thread.java:745)[?:1.7.0_79]Caused by: java.lang.OutOfMemoryError: unable to create new native thread at java.lang.Thread.start0(Native Method)[?:1.7.0_79] at java.lang.Thread.start(Thread.java:714)[?:1.7.0_79] at java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:949)[?:1.7.0_79] at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1360)[?:1.7.0_79] at java.util.concurrent.Executors$DelegatedExecutorService.execute(Executors.java:628)[?:1.7.0_79] at org.apache.curator.utils.CloseableExecutorService.submit(CloseableExecutorService.java:191)[curator-client-2.10.0.jar:?] at org.apache.curator.framework.recipes.cache.PathChildrenCache.submitToExecutor(PathChildrenCache.java:812)[curator-recipes-2.10.0.jar:?] at org.apache.curator.framework.recipes.cache.PathChildrenCache.offerOperation(PathChildrenCache.java:763)[curator-recipes-2.10.0.jar:?] at org.apache.curator.framework.recipes.cache.PathChildrenCache.start(PathChildrenCache.java:310)[curator-recipes-2.10.0.jar:?] at io.druid.indexing.overlord.RemoteTaskRunner.start(RemoteTaskRunner.java:304)[druid-indexing-service-0.9.1.1.jar:0.9.1.1] ... 19 more