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From "Chenxi Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Created] (REEF-1977) OSUtils.getPID() randomly fails
Date Thu, 01 Feb 2018 22:16:00 GMT
Chenxi Zhao created REEF-1977:
---------------------------------

             Summary: OSUtils.getPID() randomly fails
                 Key: REEF-1977
                 URL: https://issues.apache.org/jira/browse/REEF-1977
             Project: REEF
          Issue Type: Bug
          Components: REEF
            Reporter: Chenxi Zhao


Currently inside getPID() call, it is trying to read the command execution result without
waiting for the process execution to be completed.

There are chances that this method gets the empty result and generates below exception:

 
{code:java}
org.apache.reef.util.OSUtils getPID
SEVERE: Unable to determine PID
java.lang.NumberFormatException: For input string: ""
                at java.lang.NumberFormatException.forInputString(Unknown Source)
                at java.lang.Long.parseLong(Unknown Source)
                at java.lang.Long.valueOf(Unknown Source)
                at org.apache.reef.util.OSUtils.getPID(OSUtils.java:104)
                at org.apache.reef.runtime.common.evaluator.PIDStoreStartHandler.onNext(PIDSto
reStartHandler.java:62)
                at org.apache.reef.runtime.common.evaluator.EvaluatorRuntime$RuntimeStartHandl
er.onNext(EvaluatorRuntime.java:184)
                at org.apache.reef.runtime.common.evaluator.EvaluatorRuntime$RuntimeStartHandl
er.onNext(EvaluatorRuntime.java:178)
                at
org.apache.reef.wake.impl.PubSubEventHandler.onNext(PubSubEventHandler.java:98)
                at org.apache.reef.wake.time.runtime.RuntimeClock.run(RuntimeClock.java:292)
                at
org.apache.reef.runtime.common.REEFEnvironment.run(REEFEnvironment.java:191)
                at org.apache.reef.runtime.common.REEFLauncher.main(REEFLauncher.java:181)
{code}
 



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