[REEF-1977] OSUtils.getPID() randomly fails

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Component/s: REEF
• Assignee: Unassigned
• Reporter: Chenxi Zhao
• Created: 01/Feb/18 22:15
• Updated: 15/Feb/18 04:14
• Resolved: 15/Feb/18 04:14

Description

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:

 

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)