[jira] [Created] (FLINK-28274) ContinuousFileMonitoringFunction doesn't work with reactive mode

[Robert Metzger (Jira)]

Title: Message Title

Robert Metzger created an issue   Flink / FLINK-28274 ContinuousFileMonitoringFunction doesn't work with reactive mode Issue Type: Bug Affects Versions: 1.16.0 Assignee: Unassigned Components: API / DataStream, Runtime / Coordination Created: 28/Jun/22 06:34 Priority: Major Reporter: Robert Metzger This issue was first reported in the Flink Slack: https://apache-flink.slack.com/archives/C03G7LJTS2G/p1656257678477659 It seems that reactive mode is changing the parallelism of the `ContinuousFileMonitoringFunction`, which is supposed to always run with a parallelism of 1. This is the error INITIALIZING to FAILED with failure cause: java.lang.IllegalArgumentException: ContinuousFileMonitoringFunction retrieved invalid state. at org.apache.flink.util.Preconditions.checkArgument(Preconditions.java:138) You can see from the logs that the parallelism is changing on a rescale event: 2022-06-27 13:38:54,979 | INFO | .executiongraph.ExecutionGraph | Source: Custom File Source (1/1) (cbaad20beee908b95c9fe5c34ba76bfa) switched from RUNNING to CANCELING. 2022-06-27 13:38:55,254 | INFO | .executiongraph.ExecutionGraph | Source: Custom File Source (1/1) (cbaad20beee908b95c9fe5c34ba76bfa) switched from CANCELING to CANCELED. 2022-06-27 13:38:55,657 | INFO | .executiongraph.ExecutionGraph | Source: Custom File Source (2/2) (6ceaacbe8d9aa507b0a56c850082da8c) switched from DEPLOYING to INITIALIZING. 2022-06-27 13:38:55,722 | INFO | .executiongraph.ExecutionGraph | Source: Custom File Source (2/2) (6ceaacbe8d9aa507b0a56c850082da8c) switched from INITIALIZING to RUNNING. 2022-06-27 13:44:54,058 | INFO | .executiongraph.ExecutionGraph | Source: Custom File Source (1/2) (665b12194741744d6bba4408a252fa45) switched from RUNNING to CANCELING. 2022-06-27 13:45:00,825 | INFO | .executiongraph.ExecutionGraph | Source: Custom File Source (1/2) (3cc408fd0eb9ddfa97b22f4dfc09d8dc) switched from DEPLOYING to INITIALIZING. 2022-06-27 13:45:00,826 | INFO | .executiongraph.ExecutionGraph | Source: Custom File Source (1/2) (3cc408fd0eb9ddfa97b22f4dfc09d8dc) switched from INITIALIZING to RUNNING. 2022-06-27 13:45:01,434 | INFO | .executiongraph.ExecutionGraph | Source: Custom File Source (2/2) (79338042d84b6458c34760bc85145512) switched from DEPLOYING to INITIALIZING. 2022-06-27 13:45:02,427 | INFO | .executiongraph.ExecutionGraph | Source: Custom File Source (2/2) (79338042d84b6458c34760bc85145512) switched from INITIALIZING to RUNNING. Add Comment   This message was sent by Atlassian Jira (v8.20.10#820010-sha1:ace47f9)