[FLINK-5496] ClassCastException when using Mesos HA mode

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.2.0, 1.3.0
• Fix Version/s: 1.2.0, 1.3.0
• Component/s: Deployment / Mesos
• Assignee: Till Rohrmann
• Reporter: Till Rohrmann
• Created: 15/Jan/17 19:23
• Updated: 23/Jan/17 12:29
• Resolved: 23/Jan/17 12:29

Description

When using the Mesos' HA mode, one cannot start the Mesos appmaster, because the following class cast exception occurs:

java.lang.ClassCastException: org.apache.flink.shaded.org.apache.curator.framework.imps.CuratorFrameworkImpl cannot be cast to org.apache.flink.mesos.shaded.org.apache.curator.framework.CuratorFramework
	at org.apache.flink.mesos.util.ZooKeeperUtils.startCuratorFramework(ZooKeeperUtils.java:38)
	at org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner.createWorkerStore(MesosApplicationMasterRunner.java:510)
	at org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner.runPrivileged(MesosApplicationMasterRunner.java:320)
	at org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner$1.call(MesosApplicationMasterRunner.java:178)
	at org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner$1.call(MesosApplicationMasterRunner.java:175)
	at org.apache.flink.runtime.security.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:29)
	at org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner.run(MesosApplicationMasterRunner.java:175)
	at org.apache.flink.mesos.runtime.clusterframework.MesosApplicationMasterRunner.main(MesosApplicationMasterRunner.java:135)

It seems as if the flink-mesos module relocates the curator dependency in another namespace than flink-runtime. Not sure why this is done.

Issue Links

• links to: GitHub Pull Request #3156