During Migration of EBS 11.5.10.2 from AIX to RHEL 5, adpatch throws error for 4135997

Problem Summary---------------------------------------------------
During Migration of EBS 11.5.10.2 from AIX to RHEL 5, adpatch throws error for 4135997

Problem Description
---------------------------------------------------
adogjf() Unable to generate jar files under JAVA_TOP

AutoPatch error:
Failed to generate the product JAR files


AutoPatch error:
Error updating master archive


An error occurred while Updating Oracle Applications Java files.

I understand this is due to
: Javakey error ,

I have also copied identitydb.obj from source server.


adpatch.log

ERROR: JarSigner subcommand exited with status 1

JarSigner standard output:
jarsigner error: java.lang.RuntimeException: keystore load: incorrect magic

No error output from jarsigner