Github user zentol commented on the issue:
https://github.com/apache/flink/pull/5523
Please modify travis_mvn_watchdog and update the rocksdb entry:
```
MODULES_CORE="\
flink-test-utils-parent/flink-test-utils,\
flink-contrib/flink-statebackend-rocksdb,\
flink-clients,\
flink-core,\
flink-java,\
flink-optimizer,\
flink-runtime,\
flink-runtime-web,\
flink-scala,\
flink-scala-shell,\
flink-streaming-java,\
flink-streaming-scala"
```---
