Gerrit build failure

Hi all,

Does anyone know why the following build failed?

https://ci.libreoffice.org/job/gerrit_master/4596/

It is giving the following error:

make[2]: warning: jobserver unavailable: using -j1.  Add '+' to parent
make rule.
added manifest
adding: SampleDialog.uno.Manifest(in = 67) (out= 64)(deflated 4%)
adding: com/(in = 0) (out= 0)(stored 0%)
adding: com/sun/(in = 0) (out= 0)(stored 0%)
adding: com/sun/star/(in = 0) (out= 0)(stored 0%)
adding: com/sun/star/comp/(in = 0) (out= 0)(stored 0%)
adding: com/sun/star/comp/sdk/(in = 0) (out= 0)(stored 0%)
adding: com/sun/star/comp/sdk/examples/(in = 0) (out= 0)(stored 0%)
adding: com/sun/star/comp/sdk/examples/SampleDialog$ActionListenerImpl.class(in
= 1487) (out= 738)(deflated 50%)
adding: com/sun/star/comp/sdk/examples/SampleDialog.class(in = 5459)
(out= 2511)(deflated 54%)
  adding: SampleDialog.uno.jar (deflated 20%)
  adding: META-INF/manifest.xml (deflated 39%)
added manifest
adding: SampleDialog.uno.Manifest(in = 67) (out= 64)(deflated 4%)
adding: com/(in = 0) (out= 0)(stored 0%)
adding: com/sun/(in = 0) (out= 0)(stored 0%)
adding: com/sun/star/(in = 0) (out= 0)(stored 0%)
adding: com/sun/star/comp/(in = 0) (out= 0)(stored 0%)
adding: com/sun/star/comp/sdk/(in = 0) (out= 0)(stored 0%)
adding: com/sun/star/comp/sdk/examples/(in = 0) (out= 0)(stored 0%)
adding: com/sun/star/comp/sdk/examples/SampleDialog$ActionListenerImpl.class(in
= 1487) (out= 738)(deflated 50%)
adding: com/sun/star/comp/sdk/examples/SampleDialog.class(in = 5459)
(out= 2511)(deflated 54%)
adding: SampleDialog/(in = 0) (out= 0)(stored 0%)
adding: SampleDialog/META-INF/(in = 0) (out= 0)(stored 0%)
adding: SampleDialog/META-INF/manifest.xml(in = 387) (out= 236)(deflated 39%)
  adding: SampleDialog.uno.jar (deflated 23%)
  adding: META-INF/manifest.xml (deflated 39%)
ERROR: unopkg cannot be started. The lock file indicates it is already
running. If this does not apply, delete the lock file at:
/home/tdf/lode/jenkins/workspace/lo_gerrit/Config/linux_clang_dbgutil_64/workdir/CustomTarget/odk/build-examples_java/user/.lock
warn:unotools.config:21051:21051:unotools/source/config/configmgr.cxx:168:
ConfigManager not empty
Makefile:110: recipe for target
'/home/tdf/lode/jenkins/workspace/lo_gerrit/Config/linux_clang_dbgutil_64/workdir/CustomTarget/odk/build-examples_java/out/sdk/LINUXexample.out/misc/devguide_basicanddialogs_creatingdialogs_register_component.flag'
failed
make[2]: *** 
[/home/tdf/lode/jenkins/workspace/lo_gerrit/Config/linux_clang_dbgutil_64/workdir/CustomTarget/odk/build-examples_java/out/sdk/LINUXexample.out/misc/devguide_basicanddialogs_creatingdialogs_register_component.flag]
Error 1
/home/tdf/lode/jenkins/workspace/lo_gerrit/Config/linux_clang_dbgutil_64/odk/build-examples_common.mk:6:
recipe for target
'/home/tdf/lode/jenkins/workspace/lo_gerrit/Config/linux_clang_dbgutil_64/workdir/CustomTarget/odk/build-examples_java.done'
failed
make[1]: *** 
[/home/tdf/lode/jenkins/workspace/lo_gerrit/Config/linux_clang_dbgutil_64/workdir/CustomTarget/odk/build-examples_java.done]
Error 2
make[1]: *** Waiting for unfinished jobs....
Makefile:285: recipe for target 'build' failed
make: *** [build] Error 2
Build step 'Execute shell' marked build as failure
[BFA] Scanning build for known causes...
[BFA] No failure causes found
[BFA] Done. 1s
Finished: FAILURE



Chris