deniskuzZ commented on code in PR #6263:
URL: https://github.com/apache/hive/pull/6263#discussion_r2685038877
##########
iceberg/iceberg-handler/src/test/java/org/apache/iceberg/mr/hive/HiveIcebergStorageHandlerWithEngineBase.java:
##########
@@ -210,4 +225,83 @@ protected void validateBasicStats(Table icebergTable,
String dbName, String tabl
Assert.assertEquals(summary.get(entry.getValue()),
hmsParams.get(entry.getKey()));
}
}
+
+ /**
+ * Executes multiple SQL queries concurrently with controlled
synchronization for testing.
+ *
+ * <p>This method supports two synchronization modes:
+ * <ul>
+ * <li><b>Ext-locking mode</b> ({@code useExtLocking=true}): Queries
execute in strict sequential
+ * order (sql[0], then sql[1], then sql[2], ...) to verify that
external table locking prevents
+ * concurrent execution. Each query waits for its turn before
starting.</li>
+ * <li><b>Barrier synchronization mode</b> ({@code useExtLocking=false}):
Queries execute concurrently,
+ * then commit in order to test optimistic concurrency control and
retry on write conflicts.</li>
+ * </ul>
+ *
+ * <p>Uses {@link TestUtilPhaser} and {@link HiveIcebergStorageHandlerStub}
to coordinate thread
+ * execution order deterministically.
+ *
+ * @param useExtLocking if true, enables external locking mode with
sequential execution;
+ * if false, enables concurrent execution with ordered
commits
+ * @param retryStrategies comma-separated list of Hive query retry
strategies to enable
+ * @param sql array of SQL queries to execute. If single query provided,
it's executed by all threads.
+ * If multiple queries provided, each thread executes sql[i]
where i is the thread index.
+ * @throws Exception if any query execution fails
+ */
+ protected void executeConcurrently(
+ boolean useExtLocking, String retryStrategies, String... sql) throws
Exception {
+
+ int nThreads = sql.length > 1 ? sql.length : 2;
+ TestUtilPhaser testUtilPhaser = TestUtilPhaser.getInstance();
+
+ try {
+ Tasks.range(nThreads)
+ .executeWith(Executors.newFixedThreadPool(nThreads))
Review Comment:
good point! it was the original code
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