Ethanlm commented on a change in pull request #3097: STORM-3475 Add
ConstraintSolverStrategy Unit Test
URL: https://github.com/apache/storm/pull/3097#discussion_r311770077
##########
File path:
storm-server/src/test/java/org/apache/storm/scheduler/resource/strategies/scheduling/TestConstraintSolverStrategy.java
##########
@@ -202,6 +204,50 @@ protected SolverResult backtrackSearch(SearcherState
state) {
}
}
+ /*
+ * Test scheduling large number of executors and constraints.
+ *
+ * Cluster has sufficient resources for scheduling to succeed but can fail
due to StackOverflowError.
+ */
+ @ParameterizedTest
+ @ValueSource(ints = {5, 20})
+ public void testScheduleLargeExecutorConstraintCount(int
parallelismMultiplier) {
+ // Add 1 topology with large number of executors and constraints. Too
many can cause a java.lang.StackOverflowError
+ Config config = createCSSClusterConfig(10, 10, 0, null);
+ config.put(Config.TOPOLOGY_RAS_CONSTRAINT_MAX_STATE_SEARCH, 50000);
+
+ List<List<String>> constraints = new LinkedList<>();
+ addContraints("spout-0", "spout-0", constraints);
+ addContraints("bolt-1", "bolt-1", constraints);
+ addContraints("spout-0", "bolt-0", constraints);
+ addContraints("bolt-2", "spout-0", constraints);
+ addContraints("bolt-1", "bolt-2", constraints);
+ addContraints("bolt-1", "bolt-0", constraints);
+ addContraints("bolt-1", "spout-0", constraints);
+
+ config.put(Config.TOPOLOGY_RAS_CONSTRAINTS, constraints);
+ TopologyDetails topo = genTopology("testTopo-" +
parallelismMultiplier, config, 10, 10, 30 * parallelismMultiplier, 30 *
parallelismMultiplier, 31414, 0, "user");
+ Topologies topologies = new Topologies(topo);
+
+ Map<String, SupervisorDetails> supMap = genSupervisors(30 *
parallelismMultiplier, 30, 3500, 35000);
+ Cluster cluster = makeCluster(topologies, supMap);
+
+ ResourceAwareScheduler scheduler = new ResourceAwareScheduler();
+ scheduler.prepare(config);
+ scheduler.schedule(topologies, cluster);
+
+ boolean scheduleSuccess =
isStatusSuccess(cluster.getStatus(topo.getId()));
+
+ if (parallelismMultiplier <= 5) {
+ Assert.assertTrue(scheduleSuccess);
+ } else if (parallelismMultiplier == 20) {
Review comment:
Maybe I was not clear. I think we should find a number/range so that we can
have
```
if (parallelismMultiplier <= xx) {
...
} else {
...
}
```
But I am fine with the current code.
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