https://community.cloudera.com/t5/Support-Questions/Resource-Manager-java-lang-OutOfMemoryError-unable-to-create/m-p/303569#M221598 <P>Hello.</P><P>I'm running HDP 3.1.0 and Yarn resource Manager does not start, always crash with the below error, no matter the amount of Heap memory specified:</P><P>&nbsp;</P><P>2020-09-28 15:12:57,738 INFO ipc.Server (Server.java:run(1074)) - Starting Socket Reader #1 for port 8030<BR />2020-09-28 15:12:57,747 INFO pb.RpcServerFactoryPBImpl (RpcServerFactoryPBImpl.java:createServer(173)) - Adding protocol org.apache.hadoop.yarn.api.ApplicationMasterProtocolPB to the server<BR />2020-09-28 15:12:57,748 FATAL resourcemanager.ResourceManager (ResourceManager.java:main(1516)) - Error starting ResourceManager<BR />java.lang.OutOfMemoryError: unable to create new native thread<BR />at java.lang.Thread.start0(Native Method)<BR />at java.lang.Thread.start(Thread.java:714)<BR />at org.apache.hadoop.ipc.Server.start(Server.java:3070)<BR />at org.apache.hadoop.yarn.server.resourcemanager.ApplicationMasterService.serviceStart(ApplicationMasterService.java:210)<BR />at org.apache.hadoop.service.AbstractService.start(AbstractService.java:194)<BR />at org.apache.hadoop.service.CompositeService.serviceStart(CompositeService.java:121)<BR />at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$RMActiveServices.serviceStart(ResourceManager.java:869)<BR />at org.apache.hadoop.service.AbstractService.start(AbstractService.java:194)</P><P>&nbsp;</P><P>Please, any tip will be appreciated.</P><P>&nbsp;</P><P>Thanks</P> Mon, 28 Sep 2020 22:26:31 GMT gnavarro54 2020-09-28T22:26:31Z