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Posted to issues@spark.apache.org by "Dongjoon Hyun (Jira)" <ji...@apache.org> on 2025/12/04 16:22:00 UTC

[jira] [Updated] (SPARK-54551) Fix random hangs in SparkConnectJdbcDataTypeSuite

     [ https://issues.apache.org/jira/browse/SPARK-54551?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dongjoon Hyun updated SPARK-54551:
----------------------------------
    Parent Issue: SPARK-51166  (was: SPARK-54137)

> Fix random hangs in SparkConnectJdbcDataTypeSuite
> -------------------------------------------------
>
>                 Key: SPARK-54551
>                 URL: https://issues.apache.org/jira/browse/SPARK-54551
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 4.1.0
>            Reporter: Vinod KC
>            Assignee: Vinod KC
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.1.0
>
>
> When running `SparkConnectJdbcDataTypeSuite` test cases in non-debug mode, the child server process spawned for these tests can randomly block on write() calls when the stdout/stderr pipe buffers fill up.
> This occurs because the output streams are not being consumed, causing the process to hang indefinitely. The issue manifests intermittently depending on how much output the server generates during different test runs.



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