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  1. Jenkins
  2. JENKINS-52635

Pipeline job using P4 failing with NPE

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    • Icon: Bug Bug
    • Resolution: Cannot Reproduce
    • Icon: Major Major
    • p4-plugin
    • Jenkins ver. 2.73.3
      P4 Plugin ver. 1.8.12

      I created a very simple pipeline job to test polling without a sync (preview only mode) and it is failing with the below error:

      P4 Task: failed: java.lang.NullPointerException

      There is no exception logged in the Jenkins log. The exception seemed to occur on the slave, so I checked the swarm log and nothing was found.

      Here is the pipeline script:

      pipeline {
    agent {
        label "CentOS6"
    }
    
    stages {
        stage("Init") {
            steps {
                checkout perforce(
                    credential: 'p4-hbase-build', 
                    populate: previewOnly(quiet: true), 
                    workspace: manualSpec(
                        charset: 'none', 
                        name: 'jenkins-${NODE_NAME}-${JOB_NAME}-${EXECUTOR_NUMBER}', 
                        pinHost: false, 
                        spec: clientSpec(
                            allwrite: false, 
                            backup: false, 
                            clobber: true, 
                            compress: false, 
                            line: 'LOCAL', 
                            locked: false, 
                            modtime: false, 
                            rmdir: false, 
                            serverID: '', 
                            streamName: '', 
                            type: 'WRITABLE', 
                            view: '//sandbox/hdara/test/... //jenkins-${NODE_NAME}-${JOB_NAME}-${EXECUTOR_NUMBER}/...'
                        )
                    )
                )
            }
        }
        
        stage("Run") {
            steps {
                echo "INFO: Running..."
                sh "export"
            }
        }
    }
}

      Here is the job console output:

      Started by user Hari Krishna Dara
Running in Durability level: MAX_SURVIVABILITY
[Pipeline] node
Running on slave-a6209140 in /home/jenkins/workspace/test
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Init)
[Pipeline] checkout
... p4 client -o jenkins-slave-a6209140-test-0 +
... p4 info +
... p4 client -o jenkins-slave-a6209140-test-0 +
... p4 info +
... p4 info +
... p4 client -i +
... client: jenkins-slave-a6209140-test-0
... p4 client -o jenkins-slave-a6209140-test-0 +
... p4 info +
... p4 counter change +
... p4 changes -m1 -ssubmitted //jenkins-slave-a6209140-t___ +
Building on Node: slave-a6209140
... p4 client -o jenkins-slave-a6209140-test-0 +
... p4 info +

P4 Task: establishing connection.
... server: p4proxy-rep:1999
... node: slave

P4 Task: attempt: 1
P4 Task: failed: java.lang.NullPointerException
[Pipeline] }
[Pipeline] // stage
[Pipeline] stage
[Pipeline] { (Run)
Stage "Run" skipped due to earlier failure(s)
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
ERROR: P4 Task: failed: java.lang.NullPointerException
Finished: FAILURE

      I tried to capture the NPE by starting swarm JVM in debug mode and put a breakpoint via jdb. Here is the stacktrace:

        [1] org.jenkinsci.plugins.p4.client.ClientHelper.tidyWorkspace (ClientHelper.java:449)
  [2] org.jenkinsci.plugins.p4.tasks.CheckoutTask.task (CheckoutTask.java:143)
  [3] org.jenkinsci.plugins.p4.tasks.AbstractTask.tryTask (AbstractTask.java:211)
  [4] org.jenkinsci.plugins.p4.tasks.CheckoutTask.invoke (CheckoutTask.java:137)
  [5] org.jenkinsci.plugins.p4.tasks.CheckoutTask.invoke (CheckoutTask.java:30)
  [6] hudson.FilePath$FileCallableWrapper.call (FilePath.java:2,750)
  [7] hudson.remoting.UserRequest.perform (UserRequest.java:153)
  [8] hudson.remoting.UserRequest.perform (UserRequest.java:50)
  [9] hudson.remoting.Request$2.run (Request.java:336)
  [10] hudson.remoting.InterceptingExecutorService$1.call (InterceptingExecutorService.java:68)
  [11] java.util.concurrent.FutureTask.run (FutureTask.java:266)
  [12] java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1,142)
  [13] java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:617)
  [14] hudson.remoting.Engine$1$1.run (Engine.java:94)
  [15] java.lang.Thread.run (Thread.java:745)

      Looks like iclient is null as seen in the below jdb output:

      pool-1-thread-11 for JNLP4-connect connection to slave/10.253.229.26:5000 id=239[1] print iclient
 iclient = null
pool-1-thread-11 for JNLP4-connect connection to slave/10.253.229.26:5000 id=239[1] print connection
 connection = "com.perforce.p4java.impl.mapbased.rpc.OneShotServerImpl@104446f1"
pool-1-thread-11 for JNLP4-connect connection to slave/10.253.229.26:5000 id=239[1] print connection.getClient("jenkins-slave-a6209140-test-0")
 connection.getClient("jenkins-slave-a6209140-test-0") = null
pool-1-thread-11 for JNLP4-connect connection to slave/10.253.229.26:5000 id=239[1] print connection.getClass().getName()
 connection.getClass().getName() = "com.perforce.p4java.impl.mapbased.rpc.OneShotServerImpl"
pool-1-thread-11 for JNLP4-connect connection to slave/10.253.229.26:5000 id=239[1] print connection.getClientName()
 connection.getClientName() = null
pool-1-thread-11 for JNLP4-connect connection to slave/10.253.229.26:5000 id=239[1] print connection.getServerHostPort()
 connection.getServerHostPort() = "p4proxy-rep:1999"
pool-1-thread-11 for JNLP4-connect connection to slave/10.253.229.26:5000 id=239[1] print connection.getAuthTicket("build")
 connection.getAuthTicket("build") = "FG9435026878130GD728FD8E02A77DD2"

            p4karl Karl Wirth
            haridsv Hari Dara
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              Created:
              Updated:
              Resolved: