[CASSANDRA-715] HHOM goes into infinite loop, wasting cpu

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 0.6

Environment

debian lenny amd64 OpenJDK 64-Bit Server VM (build 1.6.0_0-b11, mixed mode)

• Severity: Normal
• Assignee: Jonathan Ellis
• Reporter: Brandon Williams

Authors

Jonathan Ellis

• Created: 19/Jan/10 05:03
• Updated: 16/Apr/19 09:33
• Resolved: 19/Jan/10 18:38

Description

To replicate: take a host down, cause hints to it, wait for HHOM to kick in

The issue is line 201 of HHOM:
startColumn = keyColumn.name(); // repeating the last as the first is fine since we just deleted it

That comment is false. The column may not have been deleted, since the endpoint could still be down. This causes HHOM to go into an infinite loop trying to deliver hints to a down host.