[MESOS-867] ZK Membership IDs are 32 bit signed integers, not 64 bit unsigned integers.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.16.0
• Assignee: Benjamin Mahler
• Reporter: Benjamin Mahler
• Created: 05/Dec/13 20:18
• Updated: 05/Dec/13 23:38
• Resolved: 05/Dec/13 23:38

Description

The ZK Group code was written using 64 bit unsigned integers for the sequence numbers, however it is clearly documented that these are signed 32 bit integers that will overflow when 4 billion is reached:

http://zookeeper.apache.org/doc/r3.1.2/zookeeperProgrammers.html#Sequence+Nodes+--+Unique+Naming

This is something that can occur over a long period with significant churn, but we should fix it as the code does not handle it.