[jira] [Created] (FLINK-34496) Classloading deadlock between ExecNodeMetadataUtil and JsonSerdeUtil

["Chesnay Schepler (Jira)" <ji...@apache.org>]

Chesnay Schepler created FLINK-34496:
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             Summary: Classloading deadlock between ExecNodeMetadataUtil and JsonSerdeUtil
                 Key: FLINK-34496
                 URL: https://issues.apache.org/jira/browse/FLINK-34496
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 1.18.1
            Reporter: Chesnay Schepler
             Fix For: 1.19.0, 1.18.2, 1.20.0


This is a fun one!

ExecNodeMetadataUtil and JsonSerdeUtil have a circular dependency in their static initialization, which can cause a classloading lockup when 2 threads are running the class initialization of each class at the same time because during class initialization they hold a lock.

{code}
Feb 22 00:31:58 "ForkJoinPool-3-worker-11" #25 daemon prio=5 os_prio=0 cpu=219.87ms elapsed=995.99s tid=0x00007ff11c50e000 nid=0xf0fc in Object.wait()  [0x00007ff12a4f3000]
Feb 22 00:31:58    java.lang.Thread.State: RUNNABLE
Feb 22 00:31:58 	at org.apache.flink.table.planner.plan.nodes.exec.serde.JsonSerdeUtil.createFlinkTableJacksonModule(JsonSerdeUtil.java:133)
Feb 22 00:31:58 	at org.apache.flink.table.planner.plan.nodes.exec.serde.JsonSerdeUtil.<clinit>(JsonSerdeUtil.java:111)

Feb 22 00:31:58 "ForkJoinPool-3-worker-7" #23 daemon prio=5 os_prio=0 cpu=54.83ms elapsed=996.00s tid=0x00007ff11c50c000 nid=0xf0fb in Object.wait()  [0x00007ff12a5f4000]
Feb 22 00:31:58    java.lang.Thread.State: RUNNABLE
Feb 22 00:31:58 	at org.apache.flink.table.planner.plan.utils.ExecNodeMetadataUtil.addToLookupMap(ExecNodeMetadataUtil.java:235)
Feb 22 00:31:58 	at org.apache.flink.table.planner.plan.utils.ExecNodeMetadataUtil.<clinit>(ExecNodeMetadataUtil.java:156)
{code}



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