HBASE-23956 Use less resources running tests (apache#1266) Addendum: TestMultiParallel thread counts were off after parent change.

Author: saintstack

hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMultiParallel.java

@@ -181,6 +181,9 @@ private static byte[][] makeKeys() {
   @Test
   public void testActiveThreadsCount() throws Exception {
     UTIL.getConfiguration().setLong("hbase.htable.threads.coresize", slaves + 1);
+    // Make sure max is at least as big as coresize; can be smaller in test context where
+    // we tune down thread sizes -- max could be < slaves + 1.
+    UTIL.getConfiguration().setLong("hbase.htable.threads.max", slaves + 1);
     try (Connection connection = ConnectionFactory.createConnection(UTIL.getConfiguration())) {
       ThreadPoolExecutor executor = HTable.getDefaultExecutor(UTIL.getConfiguration());
       try {