apache/shardingsphere · error · UnknownSQLException

0

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Error message

Unknown exception.

What it means

Error "Unknown exception." thrown in apache/shardingsphere.

Source

Thrown at infra/executor/src/main/java/org/apache/shardingsphere/infra/executor/kernel/ExecutorEngine.java:133

        List<O> result = new LinkedList<>(firstResults);
        for (Future<Collection<O>> each : restFutures) {
            try {
                result.addAll(each.get());
            } catch (final InterruptedException ex) {
                Thread.currentThread().interrupt();
                return throwException(ex);
            } catch (final ExecutionException ex) {
                return throwException(ex);
            }
        }
        return result;
    }
    
    private <O> List<O> throwException(final Exception exception) throws SQLException {
        if (exception.getCause() instanceof SQLException) {
            throw (SQLException) exception.getCause();
        }
        throw new UnknownSQLException(exception);
    }
    
    @Override
    public void close() {
        executorServiceManager.close();
    }
}

View on GitHub (pinned to e952770a21)

Solutions

1. Inspect the full server log for the root-cause stack trace preceding this entry.
2. Enable debug logging for the executor engine to capture the underlying exception.
3. Check database connectivity and thread pool saturation when this occurs intermittently.

When it happens

Trigger: The executor engine wraps an unexpected throwable that carries no specific SQL exception mapping.

Common situations: Rare infrastructure failures (thread interruption, rejected execution) surfacing through ExecutorEngine without a more specific message.

AI-assisted analysis of apache/shardingsphere@e952770a21 (2026-08-14). Data as JSON: /api/errors/8e9cd496fe25cf0b. Report an issue: GitHub.