Song Ziyang created RATIS-1751:
----------------------------------
Summary: Race condition between LeaderStateImpl & ServerState
Key: RATIS-1751
URL: https://issues.apache.org/jira/browse/RATIS-1751
Project: Ratis
Issue Type: Bug
Components: server
Affects Versions: 2.4.0
Reporter: Song Ziyang
An IndexOutOfBoundsException is thrown from LeaderStateImpl during runtime. The
error stack is attached.
After checking the code, I think there are data race conditions between
LeaderStateImpl.voterLists and ServerState.ConfigurationManager.currentConf.
CurrentConf and voterLists should be updated synchronously, since there're
strongly-related. However, in 2.4.0, currentConf in ServerState is updated in
server-thread-pool, while voterLists in LeaderStateImpl is updated in
LeaderState EventProcessor thread. There is possibility that
IndexOutOfBoundsException occurs due to this data race.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
