jenkinsci / jenkinsci/plot-plugin

[JENKINS-52128] NullPointerException in Plot plugin (pipeline)

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component:plot-plugin imported-jira-issue pipeline priority:minor resolution:unresolved
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Description

After the update to 2.1.0 (don't remember which version we had before, but probably < 2.0) we get consistently an "Oops" page from Jenkins when accessing the "Plots" page of a specific job.

The stack trace looks like this:

 

```
java.lang.NullPointerException
at hudson.plugins.plot.Plot.compareTo(Plot.java:403)
at hudson.plugins.plot.Plot.compareTo(Plot.java:78)
at java.util.ComparableTimSort.countRunAndMakeAscending(ComparableTimSort.java:320)
at java.util.ComparableTimSort.sort(ComparableTimSort.java:188)
at java.util.Arrays.sort(Arrays.java:1312)
at java.util.Arrays.sort(Arrays.java:1506)
at java.util.ArrayList.sort(ArrayList.java:1462)
at java.util.Collections.sort(Collections.java:141)
at hudson.plugins.plot.PlotReport.(PlotReport.java:52)
at hudson.plugins.plot.PlotAction.getTarget(PlotAction.java:96)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:674)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)
at org.kohsuke.stapler.MetaClass$10.dispatch(MetaClass.java:374)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:715)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)
at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:248)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:715)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)
at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:860)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:157)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:105)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:90)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:530)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)
at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
```

After experimenting with a couple of test jobs I have come to this conclusion:



  • The crash only happens in a pipeline job, not freestyle

  • The crash only happens when there are multiple plots in the same group (have only tried a single group with 2 plots, though)

    • If the plots are in separate groups, everything is OK



  • The crash only happens if the plots have no title (whether set to '' or just left out)

    • It doesn't matter whether the titles are identical or not



This small pipeline snippet will demonstrate the problem. Build it, then access "Plots", and you should get the crash:

```
pipeline {
    agent any
    stages {
        stage('test') {
            steps {
                sh 'echo "S\n$(date +%S)" > values-1.csv'
                sh 'echo "N\n$(date +%N)" > values-1.csv'
                plot csvFileName: 'plot-1.csv', csvSeries: [[file: 'values-1.csv']], group: 'test', style: 'line', title: ''
                plot csvFileName: 'plot-2.csv', csvSeries: [[file: 'values-2.csv']], group: 'test', style: 'line', title: ''
            }
        }
    }
}
```

Maybe a clue: The resulting files (e.g plot-1.csv) begin with these two lines:

```
"Title",
"Value","Series Label","Build Number","Build Date","URL"

```

Note the absence of value in line 1. For freestyle jobs, the first line has a "" after the comma.

 

---
Originally reported by pharman, imported from: NullPointerException in Plot plugin (pipeline)


  • assignee: vgaidarji
  • status: Open
  • priority: Minor
  • component(s): plot-plugin
  • label(s): pipeline
  • resolution: Unresolved
  • votes: 0
  • watchers: 2
  • imported: 20260512-210953

Raw content of original issue

After the update to 2.1.0 (don't remember which version we had before, but probably < 2.0) we get consistently an "Oops" page from Jenkins when accessing the "Plots" page of a specific job.



The stack trace looks like this:



 




java.lang.NullPointerException

	at hudson.plugins.plot.Plot.compareTo(Plot.java:403)

	at hudson.plugins.plot.Plot.compareTo(Plot.java:78)

	at java.util.ComparableTimSort.countRunAndMakeAscending(ComparableTimSort.java:320)

	at java.util.ComparableTimSort.sort(ComparableTimSort.java:188)

	at java.util.Arrays.sort(Arrays.java:1312)

	at java.util.Arrays.sort(Arrays.java:1506)

	at java.util.ArrayList.sort(ArrayList.java:1462)

	at java.util.Collections.sort(Collections.java:141)

	at hudson.plugins.plot.PlotReport.<init>(PlotReport.java:52)

	at hudson.plugins.plot.PlotAction.getTarget(PlotAction.java:96)

	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:674)

	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)

	at org.kohsuke.stapler.MetaClass$10.dispatch(MetaClass.java:374)

	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:715)

	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)

	at org.kohsuke.stapler.MetaClass$5.doDispatch(MetaClass.java:248)

	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)

	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:715)

	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:845)

	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:649)

	at org.kohsuke.stapler.Stapler.service(Stapler.java:238)

	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:860)

	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)

	at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)

	at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:157)

	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)

	at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:105)

	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)

	at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)

	at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:90)

	at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)

	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)

	at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)

	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)

	at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)

	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)

	at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)

	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1637)

	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)

	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)

	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)

	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)

	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:190)

	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)

	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:188)

	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)

	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:168)

	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)

	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)

	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:166)

	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)

	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)

	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)

	at org.eclipse.jetty.server.Server.handle(Server.java:530)

	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:347)

	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:256)

	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)

	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)

	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)

	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:247)

	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:140)

	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)

	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:382)

	at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)

	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

	at java.lang.Thread.run(Thread.java:748)




After experimenting with a couple of test jobs I have come to this conclusion:


    

    	
  • The crash only happens in a pipeline job, not freestyle
    • 

    	
  • The crash only happens when there are multiple plots in the same group (have only tried a single group with 2 plots, though)

    	
      

      		
    • If the plots are in separate groups, everything is OK
      • 

      	
    

    	
    • 

    	
  • The crash only happens if the plots have no title (whether set to '' or just left out)

    	
      

      		
    • It doesn't matter whether the titles are identical or not
      • 

      	
    

    	
    • 




This small pipeline snippet will demonstrate the problem. Build it, then access "Plots", and you should get the crash:




pipeline {

    agent any

    stages {

        stage('test') {

            steps {

                sh 'echo "S\n$(date +%S)" > values-1.csv'

                sh 'echo "N\n$(date +%N)" > values-1.csv'

                plot csvFileName: 'plot-1.csv', csvSeries: [[file: 'values-1.csv']], group: 'test', style: 'line', title: ''

                plot csvFileName: 'plot-2.csv', csvSeries: [[file: 'values-2.csv']], group: 'test', style: 'line', title: ''

            }

        }

    }

}




Maybe a clue: The resulting files (e.g plot-1.csv) begin with these two lines:




"Title",

"Value","Series Label","Build Number","Build Date","URL"





Note the absence of value in line 1. For freestyle jobs, the first line has a "" after the comma.



 

  • environment: Jenkins 2.121.1, plot-plugin 2.1.0

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