FAILURE: build_docker_java #18892
Description
Saw this on #18746
https://source.cloud.google.com/results/invocations/33128db9-ffe8-4dc8-bc23-142bdd05bc22/targets
> Task :grpc-interop-testing:jar
> Task :grpc-interop-testing:reconnect_test_client
> Task :grpc-interop-testing:startScripts SKIPPED
> Task :grpc-interop-testing:stresstest_client
> Task :grpc-interop-testing:test_client
> Task :grpc-interop-testing:test_server
> Task :grpc-interop-testing:installDist
BUILD SUCCESSFUL in 3m 16s
51 actionable tasks: 51 executed
/
rm: cannot remove '/root/.gradle': Directory not empty
2019-04-26 13:52:05,851 FAILED: build_docker_java [ret=1, pid=10133, time=347.2sec]