buildbot failure in ASF Buildbot on flink-docs-release-0.9

The Buildbot has detected a new failure on builder flink-docs-release-0.9 while building ASF Buildbot. Full details are available at: http://ci.apache.org/builders/flink-docs-release-0.9/builds/96 Buildbot URL: http://ci.apache.org/ Buildslave for this Build: lares_ubuntu Build Reason: The

flink git commit: [FLINK-2703] Prepare Flink for being used with Logback.

Repository: flink Updated Branches: refs/heads/master 622c1be8c -> 1243d7b96 [FLINK-2703] Prepare Flink for being used with Logback. This closes #1194 Project: http://git-wip-us.apache.org/repos/asf/flink/repo Commit: http://git-wip-us.apache.org/repos/asf/flink/commit/1243d7b9 Tree: