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https://issues.apache.org/jira/browse/HADOOP-19337?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Xiaoqiao He resolved HADOOP-19337.
----------------------------------
Fix Version/s: 3.5.0
Hadoop Flags: Reviewed
Resolution: Fixed
> Fix ZKFailoverController NPE issue due to integer overflow in parseInt when
> initHM.
> -----------------------------------------------------------------------------------
>
> Key: HADOOP-19337
> URL: https://issues.apache.org/jira/browse/HADOOP-19337
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Reporter: ConfX
> Assignee: ConfX
> Priority: Critical
> Labels: pull-request-available
> Fix For: 3.5.0
>
>
> 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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