FilePath act fails with an exception

[Sverre Moe]

Trying the following in Jenkins Script Console:

import hudson.FilePath.FileCallable
import hudson.remoting.VirtualChannel

def jenkinsInstance = jenkins.model.Jenkins.getInstance()
def project = jenkinsInstance.getItem("myMatrixProject")
def rootProject = project.getRootProject()
def someWorkspace = rootProject.getSomeWorkspace()

try { 

    def test = someWorkspace.act(new FileCallable<String>() {

        private static final long serialVersionUID = 1;

        @Override

        public String invoke(File file, VirtualChannel channel) {

            return "Testing Testing";

        }

    });

} catch (IOException e) { 

  e.printStackTrace(); 

} catch (InterruptedException e) { 

  e.printStackTrace(); 

}

It throws an exception:

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script1.groovy: 10: Can't have an abstract method in a non-abstract class. The class 'Script1$1' must be declared abstract or the method 'void checkRoles(org.jenkinsci.remoting.RoleChecker)' must be implemented.
 @ line 10, column 61.
   ct(new FileCallable<String>() {

[Ulli Hafner]

You need to implement the new method checkRoles. See JavaDoc of latest FileCallable version. (Or you can use the provided abstract base classes as parent).

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[Sverre Moe]

I have added checkRoles within my FileCallable implementation, but it still fails. Though this time with a different message.

remote file operation failed: /home/build/jenkins/workspace/myMatrixProject at hudson.remoting.Channel@54e95cec:Development-opensuse-x86_64: java.io.IOException: Unable to serialize hudson.FilePath$FileCallableWrapper@5a17f7bd

import hudson.FilePath.FileCallable

import hudson.remoting.VirtualChannel

import org.jenkinsci.remoting.RoleChecker

def jenkinsInstance = jenkins.model.Jenkins.getInstance()

def project = jenkinsInstance.getItem("myMatrixProject")

def rootProject = project.getRootProject()

def someWorkspace = rootProject.getSomeWorkspace()

try { 

    def test = someWorkspace.act(new FileCallable<String>() {

        private static final long serialVersionUID = 1;

        @Override

        public String invoke(File file, VirtualChannel channel) {

            return "Testing Testing";

        }

      

        @Override

        public void checkRoles(RoleChecker checker) throws SecurityException {

        

        }

    });

  

    println test

} catch (IOException e) {

  println e.getMessage()

} catch (InterruptedException e) { 

  println e.getMessage()

}

Could you ellaborate on "use the provided abstract base classes as parent" ?

[Sverre Moe]

Tried the following that got rid of "Unable to serialize", but still does not work. Most of the examples I find online for FilePath.act does not work in Script Console.

import hudson.FilePath.FileCallable

import hudson.remoting.VirtualChannel

import org.jenkinsci.remoting.RoleChecker

def jenkinsInstance = jenkins.model.Jenkins.getInstance()

def project = jenkinsInstance.getItem("myMatrixProject")

def rootProject = project.getRootProject()

def someWorkspace = rootProject.getSomeWorkspace()

private class MyFileCallable implements FileCallable<String> {

  private static final long serialVersionUID = 1L;

  @Override

  public String invoke(File file, VirtualChannel channel) throws IOException, InterruptedException {

    return "Testing Testing";

  }

  

  @Override

  public void checkRoles(RoleChecker checker) throws SecurityException {

    

  }

}

try { 

    def test = someWorkspace.act(new MyFileCallable());

    println test

} catch (IOException e) { 

    println e.getMessage()

} catch (InterruptedException e) { 

    println e.getMessage()

}

remote file operation failed: /home/build/jenkins/workspace/myMatrixProject at hudson.remoting.Channel@54e95cec:Development-opensuse-x86_64: java.io.IOException: Remote call on Development-opensuse-x86_64 failed

[Sverre Moe]

Tried an example code I found on GitHub. It fails excactly the same.

It cannot serialize my class implementation of the FileCallable

import java.util.*;

import java.io.File;

import java.io.IOException;

import org.apache.commons.io.FileUtils;

import hudson.FilePath.FileCallable;

import hudson.remoting.VirtualChannel;

import org.jenkinsci.remoting.RoleChecker

public class RemoteListDir implements FileCallable< Set<String> > { 

  private static final long serialVersionUID = 1452212500874165127L;

  public RemoteListDir() {}

  public Set<String> invoke(File workspace, VirtualChannel channel) throws IOException {

    manager.listener.logger.println "RemoteListDir invoke"

    Collection<File> list = FileUtils.listFiles(workspace, null, true);

    Set<String> set = new HashSet<String>();

    for(File file : list) {

      String relativePath = FolderDiff.getRelativeName(file.getAbsolutePath(), workspace.getAbsolutePath());

      set.add(relativePath);

    }

    return set;

  }

  @Override

  public void checkRoles(RoleChecker checker) throws SecurityException {

   

  }

}

def project = manager.build.getProject()

def someWorkspace = project.getSomeWorkspace()

manager.listener.logger.println "Trying FileCallable on workspace " + someWorkspace

try {

  def files = someWorkspace.act(new RemoteListDir());

  files.each { file ->

    manager.listener.logger.println file

  }

} catch (IOException e) {

  e.printStackTrace(manager.listener.logger);

} catch (InterruptedException e) {

  e.printStackTrace(manager.listener.logger);

}

java.io.IOException: remote file operation failed: /home/build/jenkins/workspace/myLib-test/SLAVE_NODES/Development-opensuse-x86_64 at hudson.remoting.Channel@76706a10:Development-opensuse-x86_64: java.io.IOException: Remote call on Development-opensuse-x86_64 failed
	at hudson.FilePath.act(FilePath.java:985)
	at hudson.FilePath.act(FilePath.java:967)
	at hudson.FilePath$act.call(Unknown Source)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
	at Script1.run(Script1.groovy:38)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:580)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:618)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:589)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SecureGroovyScript.evaluate(SecureGroovyScript.java:166)
	at org.jvnet.hudson.plugins.groovypostbuild.GroovyPostbuildRecorder.perform(GroovyPostbuildRecorder.java:361)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:761)
	at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:721)
	at hudson.model.Build$BuildExecution.post2(Build.java:183)
	at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:670)
	at hudson.model.Run.execute(Run.java:1766)
	at hudson.matrix.MatrixRun.run(MatrixRun.java:146)
	at hudson.model.ResourceController.execute(ResourceController.java:98)
	at hudson.model.Executor.run(Executor.java:374)
Caused by: java.io.IOException: Remote call on Development-opensuse-x86_64 failed
	at hudson.remoting.Channel.call(Channel.java:761)
	at hudson.FilePath.act(FilePath.java:978)
	... 20 more
Caused by: java.lang.Error: Failed to deserialize the Callable object.
	at hudson.remoting.UserRequest.perform(UserRequest.java:105)
	at hudson.remoting.UserRequest.perform(UserRequest.java:49)
	at hudson.remoting.Request$2.run(Request.java:325)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
	at ......remote call to Development-opensuse-x86_64(Native Method)
	at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1360)
	at hudson.remoting.UserResponse.retrieve(UserRequest.java:221)
	at hudson.remoting.Channel.call(Channel.java:753)
	... 21 more
Caused by: java.lang.IllegalArgumentException: Unable to locate class file for class RemoteListDir
	at hudson.remoting.Which.classFileUrl(Which.java:60)

[Sverre Moe]

I have tried that code in both "Execute system Groovy script" and "Groovy Postbuild". Same problem in either of them.

[Jesse Glick]

On Tue, Mar 24, 2015 at 1:29 PM, Ulli Hafner <ullrich...@gmail.com> wrote:
> You need to implement the new method checkRoles.

No, you do not. You just need to use MasterToSlaveFileCallable.

[Sverre Moe]

I changed the code to extend MasterToSlaveFileCallable, but the exception is still the same.

Changed:

private static class RemoteListDir implements FileCallable<Set<String>> { 

To:

private static class RemoteListDir extends MasterToSlaveFileCallable<Set<String>> { 

Caused by: java.io.IOException: Remote call on Development-opensuse-x86_64 failed
	at hudson.remoting.Channel.call(Channel.java:761)
	at hudson.FilePath.act(FilePath.java:978)
	... 28 more
Caused by: java.lang.Error: Failed to deserialize the Callable object.
	at hudson.remoting.UserRequest.perform(UserRequest.java:105)
	at hudson.remoting.UserRequest.perform(UserRequest.java:49)
	at hudson.remoting.Request$2.run(Request.java:325)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
	at ......remote call to Development-opensuse-x86_64(Native Method)
	at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1360)
	at hudson.remoting.UserResponse.retrieve(UserRequest.java:221)
	at hudson.remoting.Channel.call(Channel.java:753)
	... 29 more
Caused by: java.lang.IllegalArgumentException: Unable to locate class file for class MyClass$RemoteListDir

[Jesse Glick]

On Thu, Apr 16, 2015 at 2:49 AM, Sverre Moe <sverr...@gmail.com> wrote:
> I changed the code to extend MasterToSlaveFileCallable, but the exception is still the same.

No, that is a totally unrelated exception, which smells like a failure
to do a clean build.

[Daniel Anechitoaie]

Just wanting to say thanks. I had the same issue, Googled a little bit and found the answer here. Changing it to MasterToSlaveFileCallable worked.

[Stuart Rowe]

Jesse, are you suggesting that the RemoteClassLoader is failing to find the class file because the groovy script didn't compile?

I've hit the same problem trying to implement a FileCallable in groovy and I assumed the issue was related to runtime generated class not being visible to the RemoteClassLoader.

Do you have any suggestions for debugging this further?

[Jesse Glick]

On Wed, Jul 13, 2016 at 1:40 AM, Stuart Rowe <stuar...@gmail.com> wrote:
> I've hit the same problem trying to implement a FileCallable in groovy

It is possible you cannot make Remoting calls from the script console.
Cannot recall offhand. The Groovy runtime’s handling of class loading
is rather weird, and `RemoteClassLoader` has a lot of complicated
logic and caching layers etc., so it is quite possibly just not
supported.

[Stuart Rowe]

What's the best way to run groovy code remotely? Something similar to how the executeGroovy method handles it in https://github.com/jenkinsci/jenkins/blob/master/core/src/main/java/hudson/util/RemotingDiagnostics.java?

I've tried this by implementing a FileCallable in my plugin that takes a String version of the script to be executed. I had hoped to serialize a Closure instance instead, but each instance is a new Class that the remote class loader doesn't understand.

[Jesse Glick]

On Wed, Jul 13, 2016 at 3:28 PM, Stuart Rowe <stuar...@gmail.com> wrote:
> What's the best way to run groovy code remotely? Something similar to how
> the executeGroovy method handles it in
> https://github.com/jenkinsci/jenkins/blob/master/core/src/main/java/hudson/util/RemotingDiagnostics.java?

Yeah try just calling that method.