[bugfix/test] Limit the number of hardware threads to a max of 16 for

these tests. I have observed deadlocks on my machine which has 128
hardware threads. We should revisit this later...

Author: adamretter

exist-core/src/test/java/org/exist/collections/ConcurrencyTest.java

@@ -53,7 +53,7 @@ public class ConcurrencyTest {
     @ClassRule
     public static final ExistXmldbEmbeddedServer existEmbeddedServer = new ExistXmldbEmbeddedServer(false, true, true);
 
-    private static int CONCURRENT_THREADS = Runtime.getRuntime().availableProcessors() * 3;
+    private static int CONCURRENT_THREADS = Math.min(16, Runtime.getRuntime().availableProcessors() * 3);
     private static final int DOC_COUNT = CONCURRENT_THREADS * 10;
 
     private static final int QUERY_COUNT = 20;

extensions/indexes/lucene/src/test/java/org/exist/indexing/lucene/ConcurrencyTest.java

@@ -64,7 +64,7 @@ public class ConcurrencyTest {
     @ClassRule
     public static final ExistXmldbEmbeddedServer existEmbeddedServer = new ExistXmldbEmbeddedServer(false, true, true);
 
-    private static int CONCURRENT_THREADS = Runtime.getRuntime().availableProcessors() * 3;
+    private static int CONCURRENT_THREADS = Math.min(16, Runtime.getRuntime().availableProcessors() * 3);
 
     private static Collection test;