[KAFKA-12308] ConfigDef.parseType deadlock

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.0
• Fix Version/s: 3.0.0
• Component/s: config, KafkaConnect
• Environment: kafka 2.5.0 ; centos7 ; java version "1.8.0_231"
• Assignee: Unassigned
• Reporter: cosmozhu
• Created: 07/Feb/21 07:57
• Updated: 14/Jul/21 17:55
• Resolved: 14/Jul/21 17:55

Description

hi,
the problem was found, when I restarted ConnectDistributed

I restart ConnectDistributed in the single node for the test, with not delete connectors.
sometimes the process stopped when creating connectors.

I add some logger and found it had a deadlock in `ConfigDef.parseType`.My connectors always have the same transforms. I guess when connector startup (in startAndStopExecutor which default 8 threads) and load the same class file it has something wrong.

I attached the jstack log file.

thanks for any help.

Issue Links

• duplicates: KAFKA-7421 Deadlock in Kafka Connect during class loading