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I am using a Hudson master on windows 10 to connect to Linux (CentOS) and Windows (Windows XP) slaves. After Upgrading Hudson from 3.2.1 to 3.3.1 my Maven Legacy builds are not building anylonger on the slaves. I get an exception complaining about problems with Serialization of hudson.util.DescribableList My Setup: - JDK 1.8 - Maven 3.0.5 - Master running on Windows 10 - 2 Linux Slaves (with CentOS) - 1 Windows Slave (with Windows XP) The exception is identical on windows and linux slaves: ERROR: Failed to parse POMs hudson.util.IOException2: remote file operation failed: /opt/hudson/workspace/Webdesk-TRUNK-Compile-Only/trunk at hudson.remoting.Channel@1da06900:wfbuild02 at hudson.FilePath.act(FilePath.java:789) at hudson.FilePath.act(FilePath.java:775) at hudson.maven.MavenModuleSetBuild$RunnerImpl.parsePoms(MavenModuleSetBuild.java:739) at hudson.maven.MavenModuleSetBuild$RunnerImpl.doRun(MavenModuleSetBuild.java:547) at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:524) at hudson.model.Run.run(Run.java:1495) at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:420) at hudson.model.ResourceController.execute(ResourceController.java:82) at hudson.model.Executor.run(Executor.java:137) Caused by: java.io.IOException: Unable to serialize hudson.FilePath$FileCallableWrapper@7071ce43 at hudson.remoting.UserRequest.serialize(UserRequest.java:155) at hudson.remoting.UserRequest.<init>(UserRequest.java:55) at hudson.remoting.Channel.call(Channel.java:642) at hudson.FilePath.act(FilePath.java:782) ... 8 more Caused by: java.io.NotSerializableException: hudson.util.DescribableList at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178) at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548) at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348) at hudson.remoting.UserRequest._serialize(UserRequest.java:144) at hudson.remoting.UserRequest.serialize(UserRequest.java:153) ... 11 more Sending e-mails to: workflow_DEV@workflow.at [DEBUG] Skipping watched dependency update for build: Webdesk-TRUNK-Compile-Only #689 due to result: FAILURE Finished: FAILURE