Mirza Aliev created IGNITE-28456:
------------------------------------
Summary: Race condition in NodeImpl.init() causes double
electSelf() for single-node Raft groups
Key: IGNITE-28456
URL: https://issues.apache.org/jira/browse/IGNITE-28456
Project: Ignite
Issue Type: Bug
Reporter: Mirza Aliev
h3. Motivation
In a single-node Raft group, NodeImpl.init() calls stepDown() and then acquires
the write-lock to call electSelf() (fast-path election). However, between
stepDown() and the write-lock acquisition, the election timer can fire on a
separate thread and complete a full election cycle — transitioning the node to
STATE_LEADER and setting confCtx to BUSY via confCtx.flush().
When init() then acquires the write-lock and calls electSelf() a second time,
it calls becomeLeader() again, which tries to call confCtx.flush() while
confCtx is still BUSY — resulting in an IllegalStateException.
*Fix:* Guard the electSelf() call in init() with a state != STATE_LEADER check.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
