Error: Invalid or corrupt jarfile, during seed job verify

I have encountered an issue during seed job verify.

Error: Invalid or corrupt jarfile /repo/bbijenkins/workspace/job-dsl-verify/fem004-eiffel002/build/job-dsl-core-1.57-standalone.jar
13:16:38 Build step 'Execute shell' marked build as failure

Also one more error during the same seed job verify

Exception in thread "main" java.lang.reflect.InvocationTargetException
11:47:27 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
11:47:27 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
11:47:27 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
11:47:28 at java.lang.reflect.Method.invoke(Method.java:606)
11:47:28 at com.simontuffs.onejar.Boot.run(Boot.java:313)
11:47:28 at com.simontuffs.onejar.Boot.main(Boot.java:161)
11:47:28 Caused by: javaposse.jobdsl.dsl.DslException: startup failed:
11:47:28 /repo/bbijenkins/workspace/job-dsl-verify/fem004-eiffel002/build/bbi_ci_jobdsl_temp.groovy: 2740: unexpected token: << @ line 2740, column 1.
11:47:28 <<<<<<< eb284f825eda554f8c5b9370c37f367c71fab001
11:47:28 ^
11:47:28
11:47:28 1 error
11:47:28
11:47:28 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

Both the errors occured at different time periods.

Done some googling but did not find the clue to fix this problem,