[Client] Worker thread doesn't catch all exceptions and fails silently

Describe the bug

Precondition: async option is enabled.
When request is executed there is a worker thread that calls actual client and sends out data while calling thread returns with future to an application code (see com.clickhouse.client.AbstractClient#execute).

Here is worker function:

 return CompletableFuture.supplyAsync(() -> {
                try {
                    return sendAsync(sealedRequest, args);
                } catch (ClickHouseException | IOException e) {
                    throw new CompletionException(ClickHouseException.of(e, sealedRequest.getServer()));
                }
            }, getExecutor());

If any RuntimeException that is not derived from ClickHouseException or IOException (for example IllegalArgumentException) than it will not cause Future to fail.

This issue has been automatically marked as stale because it has not had activity in the last year. It will be closed in 30 days if no further activity occurs. Please feel free to leave a comment if you believe the issue is still relevant. Thank you for your contributions!

This issue has been automatically closed because it has not had any further activity in the last 30 days. Thank you for your contributions!

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[Client] Worker thread doesn't catch all exceptions and fails silently #1619

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[Client] Worker thread doesn't catch all exceptions and fails silently #1619

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github-actions commented on Jan 10, 2026

github-actions commented on Feb 9, 2026

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