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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