Monday, April 6, 2015

Error occurred while applying patches {org.wso2.carbon.server.extensions.PatchInstaller}

I have seen people complaining that WSO2 servers logs the following error message at server start up.


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[2015-04-06 15:48:57,572] ERROR {org.wso2.carbon.server.extensions.PatchInstaller} -  Error occurred while applying patches
java.io.IOException: Destination '/home/jayanga/WSO2/wso2am-1.7.0/repository/components/plugins/org.eclipse.equinox.launcher.gtk.linux.x86_1.1.200.v20120522-1813' exists but is a directory
 at org.wso2.carbon.server.util.FileUtils.copyFile(FileUtils.java:145)
 at org.wso2.carbon.server.util.PatchUtils.copyNewPatches(PatchUtils.java:211)
 at org.wso2.carbon.server.extensions.PatchInstaller.perform(PatchInstaller.java:80)
 at org.wso2.carbon.server.Main.invokeExtensions(Main.java:152)
 at org.wso2.carbon.server.Main.main(Main.java:94)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.wso2.carbon.bootstrap.Bootstrap.loadClass(Bootstrap.java:63)
 at org.wso2.carbon.bootstrap.Bootstrap.main(Bootstrap.java:45)


The main reason to see such error message is, some erroneous entries in the patch metadata files for files itself.

This might happen if you try to forcefully stop the server as soon as you start the server

When the server start up, it copies the patch files. If the server is forcefully stopped at that time using [ctrl+c], patching processes get immediately stopped and patch meta-data will get corrupted.

You can get rid of this issue by removing corrupted patch related meta-data manually and restating the server, so that the server will apply all the patches form the beginning.

  1. remove [CARBON_HOME]/repository/components/patches/.metadata
  2. restart the server. (do not interrupt while starting up)

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