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https://issues.apache.org/jira/browse/IGNITE-28329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ashish Mishra reassigned IGNITE-28329:
--------------------------------------
Assignee: Ashish Mishra
> AI3 examples hangs indefinitely on DDL statements during cyclic execution
> against Docker distribution
> -----------------------------------------------------------------------------------------------------
>
> Key: IGNITE-28329
> URL: https://issues.apache.org/jira/browse/IGNITE-28329
> Project: Ignite
> Issue Type: Bug
> Components: examples ai3
> Reporter: Ashish Mishra
> Assignee: Ashish Mishra
> Priority: Critical
> Attachments: SqlJdbcExampleRunner.java
>
>
> When an AI3 Example is executed repeatedly in a loop against a cluster
> running in Docker, the example hangs indefinitely on a JDBC executeUpdate
> call (either CREATE TABLE or a subsequent DDL statement) within the first 10
> iterations. The hang is permanent - no timeout fires and no exception is
> thrown. The issue is not reproducible with ZIP distribution.
> Environment
> PropertyValueClient OSWindowsClient JDKJDK 17Server deploymentDocker
> distributionBuild toolGradleReproduced onAI3, GG9
> Steps to Reproduce
> Start an Ignite cluster using the Docker distribution (server running inside
> Docker, client on Windows host)
> Run SqlJdbcExampleRunner or any example with DDL and DML statements
> configured to loop for 15 minutes (default loop interval)
> Observe that within ~10 iterations, the example hangs permanently
> You can use my attached reproducer as well
> Expected Behavior
> Each iteration of SqlJdbcExample completes successfully and the next
> iteration begins. The example should run stably for the full configured
> duration without hanging.
> Actual Behavior
> After a variable number of successful iterations (typically fewer than 10),
> the example gets stuck on executeUpdate at SqlJdbcExample.java:55 and never
> returns. The example runner logs the hang:
> [3] Completed in 4423 ms.
> Connecting to server...
> [4] HUNG after 60016 ms.
> The hung thread stack at the time of failure:
> Thread: pool-1-thread-1 [WAITING]
> at
> java.util.concurrent.CompletableFuture.join(CompletableFuture.java:2117)
> at
> org.apache.ignite.internal.jdbc.JdbcStatement.execute0(JdbcStatement.java:185)
> at
> org.apache.ignite.internal.jdbc.JdbcStatement.executeUpdate(JdbcStatement.java:198)
> at
> org.apache.ignite.example.sql.jdbc.SqlJdbcExample.main(SqlJdbcExample.java:55)
> The CompletableFuture inside JdbcStatement.execute0 never completes. The TCP
> client channel heartbeat thread remains alive and Netty NIO is polling
> normally, confirming the connection to the cluster is intact. The hang is
> server-side — the cluster receives (or drops) the request but never sends a
> response.
> From extended watchdog logs (stability test environment), the exact same
> stack is observed frozen for 11+ consecutive minutes with zero state change.
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