MapR 5.0 Documentation : HBase Thread Dump View

The HBase Thread Dump View displays a dump of the HBase thread.

Example:

Process Thread Dump: 40 active threads Thread 318 (1962516546@qtp-879081272-3): State: RUNNABLE Blocked count: 8 Waited count: 32 Stack: sun.management.ThreadImpl.getThreadInfo0(Native Method)
sun.management.ThreadImpl.getThreadInfo(ThreadImpl.java:147) sun.management.ThreadImpl.getThreadInfo(ThreadImpl.java:123) org.apache.hadoop.util.ReflectionUtils.printThreadInfo(ReflectionUtils.java:149)
org.apache.hadoop.http.HttpServer$StackServlet.doGet(HttpServer.java:695) javax.servlet.http.HttpServlet.service(HttpServlet.java:707) javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
org.apache.hadoop.http.HttpServer$QuotingInputFilter.doFilter(HttpServer.java:826) org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399) org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230) org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) org.mortbay.jetty.Server.handle(Server.java:326)
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) Thread 50 (perfnode51.perf.lab:60000-CatalogJanitor): State: TIMED_WAITING Blocked count: 1081 Waited count: 1350 Stack: java.lang.Object.wait(Native Method)
org.apache.hadoop.hbase.util.Sleeper.sleep(Sleeper.java:91) org.apache.hadoop.hbase.Chore.run(Chore.java:74) Thread 49 (perfnode51.perf.lab:60000-BalancerChore): State: TIMED_WAITING Blocked count: 0 Waited count: 270 Stack:
java.lang.Object.wait(Native Method) org.apache.hadoop.hbase.util.Sleeper.sleep(Sleeper.java:91) org.apache.hadoop.hbase.Chore.run(Chore.java:74) Thread 48 (MASTER_OPEN_REGION-perfnode51.perf.lab:60000-1): State: WAITING Blocked
count: 2 Waited count: 3 Waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@6d1cf4e5 Stack: sun.misc.Unsafe.park(Native Method) java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1925) java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:399)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)