I have plugins directory back up , Can I copy the plugin from the backup or 
do I have to install different plugin version like 1.22. Please help. 
Appreciate any help.


I see these errors in the log:
***********************************
SEVERE: Failed Inspecting plugin 
D:\Build\Jenkins\apps\jenkins\jenkins_home\plugins\credentials.jpi
java.io.IOException: Failed to expand 
D:\Build\Jenkins\apps\jenkins\jenkins_home\plugins\credentials.jpi
at hudson.ClassicPluginStrategy.explode(ClassicPluginStrategy.java:532)
at 
hudson.ClassicPluginStrategy.createPluginWrapper(ClassicPluginStrategy.java:167)
at hudson.PluginManager$1$3$1.run(PluginManager.java:288)
at 
org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282)
at jenkins.model.Jenkins$8.runTask(Jenkins.java:958)
at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:210)
at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
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:744)
Caused by: Problem creating zip: null
at org.apache.tools.ant.taskdefs.Zip.executeMain(Zip.java:741)
at org.apache.tools.ant.taskdefs.Zip.execute(Zip.java:568)
at 
hudson.ClassicPluginStrategy.createClassJarFromWebInfClasses(ClassicPluginStrategy.java:589)
at hudson.ClassicPluginStrategy.explode(ClassicPluginStrategy.java:530)
... 10 more
Caused by: java.io.EOFException
at java.io.RandomAccessFile.readFully(RandomAccessFile.java:446)
at java.io.RandomAccessFile.readFully(RandomAccessFile.java:424)
at org.apache.tools.zip.ZipFile.resolveLocalFileHeaderData(ZipFile.java:522)
at org.apache.tools.zip.ZipFile.<init>(ZipFile.java:187)
at org.apache.tools.zip.ZipFile.<init>(ZipFile.java:163)
at 
org.apache.tools.ant.types.resources.ZipResource.getInputStream(ZipResource.java:133)
at 
org.apache.tools.ant.types.resources.ResourceDecorator.getInputStream(ResourceDecorator.java:125)
at org.apache.tools.ant.taskdefs.Zip.addResource(Zip.java:1041)
at org.apache.tools.ant.taskdefs.Zip.addResources(Zip.java:1098)
at org.apache.tools.ant.taskdefs.Zip.executeMain(Zip.java:665)
- show quoted text -

On Tuesday, February 21, 2017 at 9:22:35 AM UTC-5, Prasu S wrote:
>
> I upgraded Jenkins from 1.607 to 1.658 , after the upgrade credentials 
> plugin 1.18 is missing. Due to this, we are  not able to get code from 
> Github. When I tried to re-install the same version(1.18) , it is still not 
> showing under installed plugin list.  How can I recover credential plugin. 
> Any help is greatly appreciated. Thank you
>

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