Fredrik Klauß created SPARK-46861: ------------------------------------- Summary: Potential Deadlock in DAGScheduler Key: SPARK-46861 URL: https://issues.apache.org/jira/browse/SPARK-46861 Project: Spark Issue Type: Bug Components: Scheduler Affects Versions: 4.0.0, 3.5.1, 3.4.3 Reporter: Fredrik Klauß
* The DAGScheduler could currently run into a deadlock with another thread if both access the partitions of the same RDD at the same time. * To make progress in getCacheLocs, we require both exclusive access to the RDD partitions and the location cache. We first lock on the location cache, and then on the RDD. * When accessing partitions of an RDD, the RDD first acquires exclusive access on the partitions, and then might acquire exclusive access on the location cache. * If thread 1 is able to acquire access on the RDD, while thread 2 holds the access to the location cache, we can run into a deadlock situation. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org