fix compile error

4 jobs for weigl-sync in 4 minutes and 12 seconds (queued for 1 second)
Status Name Job ID Coverage
  Setup
passed setup #22281

00:00:35

 
  Build
passed build #22282

00:01:17

 
  Test
passed test #22283

00:01:36

 
  Deploy
failed deploy #22284
allowed to fail

00:00:43

 
Name Stage Failure
failed
deploy Deploy There is an unknown failure, please try again
31117 [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
31118 [ERROR] Re-run Maven using the -X switch to enable full debug logging.
31118 [ERROR]
31118 [ERROR] For more information about the errors and possible solutions, please read the following articles:
31118 [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
31118 [ERROR]
31118 [ERROR] After correcting the problems, you can resume the build with the command
31118 [ERROR] mvn <goals> -rf :lang
ERROR: Job failed: exit code 1