The log shows the following lines :
SEVERE: Failed Inspecting plugin /shares/mts3/Hudson_CI/plugins/maven-plugin.hpi
hudson.util.IOException2: Failed to expand /shares/mts3/Hudson_CI/plugins/maven-plugin.hpi
at hudson.ClassicPluginStrategy.explode(ClassicPluginStrategy.java:359)
at hudson.ClassicPluginStrategy.createPluginWrapper(ClassicPluginStrategy.java:109)
at hudson.PluginManager$1$3$1.run(PluginManager.java:184)
at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:146)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:259)
at hudson.model.Hudson$3.runTask(Hudson.java:699)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:187)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:94)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Caused by: Error while expanding /shares/mts3/Hudson_CI/plugins/maven-plugin.hpi
java.util.zip.ZipException: invalid stored block lengths
at org.apache.tools.ant.taskdefs.Expand.expandFile(Expand.java:192)
at org.apache.tools.ant.taskdefs.Expand.execute(Expand.java:132)
at hudson.ClassicPluginStrategy.explode(ClassicPluginStrategy.java:357)
... 10 more
Caused by: java.util.zip.ZipException: invalid stored block lengths
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:147)
at java.io.FilterInputStream.read(FilterInputStream.java:90)
at org.apache.tools.ant.taskdefs.Expand.extractFile(Expand.java:343)
at org.apache.tools.ant.taskdefs.Expand.expandFile(Expand.java:179)
... 12 more

Note that the CopyArtifact plugin is not installed (see JENKINS-7745).