When updating the Warnings plugin from 3.16 to 3.17 or above, I've noticed that the plugin was giving the following error:
Note that:

• Our project has a lot of warnings (2338 warnings)
• It 'seems' to happen independently of the job running on the master or a client node.

-------------------

ERROR: Publisher hudson.plugins.warnings.WarningsPublisher aborted due to exception
hudson.util.IOException2: remote file operation failed: c:\hudson\workspace\ViCE2_C_Model at hudson.remoting.Channel@1f2afad:lbmht-flis2
at hudson.FilePath.act(FilePath.java:754)
at hudson.FilePath.act(FilePath.java:740)
at hudson.plugins.warnings.WarningsPublisher.perform(WarningsPublisher.java:235)
at hudson.plugins.analysis.core.HealthAwarePublisher.perform(HealthAwarePublisher.java:310)
at hudson.tasks.BuildStepMonitor$2.perform(BuildStepMonitor.java:27)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:664)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:639)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildSteps(AbstractBuild.java:617)
at hudson.model.Build$RunnerImpl.post2(Build.java:161)
at hudson.model.AbstractBuild$AbstractRunner.post(AbstractBuild.java:586)
at hudson.model.Run.run(Run.java:1400)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:175)
Caused by: java.io.IOException: Remote call on lbmht-flis2 failed
at hudson.remoting.Channel.call(Channel.java:672)
at hudson.FilePath.act(FilePath.java:747)
... 13 more
Caused by: java.lang.ClassNotFoundException: Failed to deserialize the Callable object. Perhaps you needed to implement DelegatingCallable?
at hudson.remoting.UserRequest.perform(UserRequest.java:100)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:270)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at hudson.remoting.Engine$1$1.run(Engine.java:60)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: hudson.plugins.warnings.parser.FileWarningsParser
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at java.io.ObjectInputStream.resolveClass(Unknown Source)
at hudson.remoting.ObjectInputStreamEx.resolveClass(ObjectInputStreamEx.java:50)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at hudson.remoting.UserRequest.deserialize(UserRequest.java:182)
at hudson.remoting.UserRequest.perform(UserRequest.java:98)
... 9 more
[TASKS] Skipping publisher since build result is FAILURE