ConfX created HADOOP-19337:
------------------------------
Summary: Null Pointer Exception in ZKFailoverController due to
integer overflow in parseInt
Key: HADOOP-19337
URL: https://issues.apache.org/jira/browse/HADOOP-19337
Project: Hadoop Common
Issue Type: Bug
Components: common
Reporter: ConfX
Assignee: ConfX
h3. *What Happened:*
A null pointer exception occurs when trying to shutdown healthMonitor.
healthMonitor is not initialized if the ha.health-monitor.rpc-timeout.ms is set
to 4294967295. The healthMonitor constructor uses parseInt() to parse
configuration values and this value overflows for parseInt and throws an
exception during healthMonitor initialization.
h3. *Buggy Code:*
{code:java}
try {
initRPC();
initHM(); // -> This throws a java.Lang.NumberFormatException and
healthMonitor is not intialized
startRPC();
mainLoop();
} catch (Exception e) {
LOG.error("The failover controller encounters runtime error: ", e);
throw e;
}
...
healthMonitor.shutdown(); // -> NPE if healthMonitor is not intialized
healthMonitor.join();
} {code}
{code:java}
Caused by: java.lang.NullPointerException
at
org.apache.hadoop.ha.ZKFailoverController.doRun(ZKFailoverController.java:266)
at
org.apache.hadoop.ha.ZKFailoverController.access$000(ZKFailoverController.java:65)
at
org.apache.hadoop.ha.ZKFailoverController$1.run(ZKFailoverController.java:186)
at
org.apache.hadoop.ha.ZKFailoverController$1.run(ZKFailoverController.java:182)
at
org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:520)
at
org.apache.hadoop.ha.ZKFailoverController.run(ZKFailoverController.java:182)
at
org.apache.hadoop.ha.MiniZKFCCluster$DummyZKFCThread.doWork(MiniZKFCCluster.java:301)
at
org.apache.hadoop.test.MultithreadedTestUtil$TestingThread.run(MultithreadedTestUtil.java:189)
{code}
h3. *How to Reproduce:*
(1) Set ha.health-monitor.rpc-timeout.ms to 4294967295.
(2) Run: test:
org.apache.hadoop.ha.TestZKFailoverController#testVerifyObserverState
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