I've been searching for a while and I don't find any information on how to fix or workaround the problem of TaskTracker shutting down due to the Jetty CPU usage bug.   We have Cloudera distribution cdh4.6.0 (which uses jetty-6.1.26.cloudera.2.jar and jetty-util-6.1.26.cloudera.2.jar).   TaskTracker shuts down after just a couple of minutes online in some of the nodes of our cluster. The following is written to the log file:   2015-02-13 15:33:05,223 FATAL org.apache.hadoop.mapred.JettyBugMonitor: ************************************************************ Jetty CPU usage: 1573657853.3%. This is greater than the fatal threshold mapred.tasktracker.jetty.cpu.threshold.fatal. Aborting JVM. ************************************************************ 2015-02-13 15:33:05,459 INFO org.apache.hadoop.mapred.TaskTracker: SHUTDOWN_MSG:     How can we fix this problem, i.e. prevent TaskTracker from shutting down or getting into a bad state? Is there a newer Jetty version we can use that does not cause the problem?   Thank you. Eduardo. ... View more