Andrew Grasso created ZOOKEEPER-2325:
----------------------------------------
Summary: Data inconsistency if all snapshots empty or missing
Key: ZOOKEEPER-2325
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2325
Project: ZooKeeper
Issue Type: Bug
Components: server
Affects Versions: 3.4.6
Reporter: Andrew Grasso
When loading state from snapshots on startup, FileTxnSnapLog.java ignores the
result of FileSnap.deserialize, which is -1L if no valid snapshots are found.
Recovery proceeds with dt.lastProcessed == 0, its initial value.
The result is that Zookeeper will process the transaction logs and then begin
serving requests with a different state than the rest of the ensemble.
To reproduce:
In a healthy zookeeper cluster of size >= 3, shut down one node.
Either delete all snapshots for this node or change all to be empty files.
Restart the node.
We believe this can happen organically if a node runs out of disk space.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
