Set disk watermarks to low values to prevent tests from failing on nodes without enough disk space (#105663)

server/src/test/java/org/elasticsearch/node/NodeTests.java

@@ -8,11 +8,11 @@
 package org.elasticsearch.node;
 
 import org.apache.lucene.tests.util.LuceneTestCase;
-import org.apache.lucene.util.Constants;
 import org.apache.lucene.util.SetOnce;
 import org.elasticsearch.bootstrap.BootstrapCheck;
 import org.elasticsearch.bootstrap.BootstrapContext;
 import org.elasticsearch.cluster.ClusterName;
+import org.elasticsearch.cluster.routing.allocation.DiskThresholdSettings;
 import org.elasticsearch.common.ReferenceDocs;
 import org.elasticsearch.common.breaker.CircuitBreaker;
 import org.elasticsearch.common.bytes.BytesReference;
@@ -189,6 +189,10 @@ public class NodeTests extends ESTestCase {
             .put(ClusterName.CLUSTER_NAME_SETTING.getKey(), InternalTestCluster.clusterName("single-node-cluster", randomLong()))
             .put(Environment.PATH_HOME_SETTING.getKey(), tempDir)
             .put(NetworkModule.TRANSPORT_TYPE_KEY, getTestTransportType())
+            // default the watermarks low values to prevent tests from failing on nodes without enough disk space
+            .put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_LOW_DISK_WATERMARK_SETTING.getKey(), "1b")
+            .put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_HIGH_DISK_WATERMARK_SETTING.getKey(), "1b")
+            .put(DiskThresholdSettings.CLUSTER_ROUTING_ALLOCATION_DISK_FLOOD_STAGE_WATERMARK_SETTING.getKey(), "1b")
             .put(dataNode());
     }
 
@@ -304,7 +308,6 @@ public class NodeTests extends ESTestCase {
     }
 
     public void testCloseOnLeakedIndexReaderReference() throws Exception {
-        assumeFalse("AwaitsFix https://github.com/elastic/elasticsearch/issues/105236", Constants.MAC_OS_X);
         Node node = new MockNode(baseSettings().build(), basePlugins());
         node.start();
         IndicesService indicesService = node.injector().getInstance(IndicesService.class);
@@ -320,7 +323,6 @@ public class NodeTests extends ESTestCase {
     }
 
     public void testCloseOnLeakedStoreReference() throws Exception {
-        assumeFalse("AwaitsFix https://github.com/elastic/elasticsearch/issues/105236", Constants.MAC_OS_X);
         Node node = new MockNode(baseSettings().build(), basePlugins());
         node.start();
         IndicesService indicesService = node.injector().getInstance(IndicesService.class);