Re-enable tests that were failing due to JDK memory bug on Debian8 (#68663) (#72126)

Author: danhermann

test/framework/src/main/java/org/elasticsearch/test/ESIntegTestCase.java

@@ -47,7 +47,6 @@
 import org.elasticsearch.action.support.DefaultShardOperationFailedException;
 import org.elasticsearch.action.support.DestructiveOperations;
 import org.elasticsearch.action.support.IndicesOptions;
-import org.elasticsearch.bootstrap.JavaVersion;
 import org.elasticsearch.client.AdminClient;
 import org.elasticsearch.client.Client;
 import org.elasticsearch.client.ClusterAdminClient;
@@ -124,7 +123,6 @@
 import org.elasticsearch.indices.IndicesRequestCache;
 import org.elasticsearch.indices.store.IndicesStore;
 import org.elasticsearch.ingest.IngestMetadata;
-import org.elasticsearch.monitor.os.OsInfo;
 import org.elasticsearch.node.NodeMocksPlugin;
 import org.elasticsearch.plugins.NetworkPlugin;
 import org.elasticsearch.plugins.Plugin;
@@ -2430,22 +2428,4 @@ public Settings onNodeStopped(String nodeName) throws Exception {
             }
         });
     }
-
-    /**
-     * On Debian 8 the "memory" subsystem is not mounted by default
-     * when cgroups are enabled, and this confuses many versions of
-     * Java prior to Java 15.  Tests that rely on machine memory
-     * being accurately determined will not work on such setups,
-     * and can use this method for selective muting.
-     * See https://github.com/elastic/elasticsearch/issues/67089
-     * and https://github.com/elastic/elasticsearch/issues/66885
-     */
-    protected boolean willSufferDebian8MemoryProblem() {
-        final NodesInfoResponse response = client().admin().cluster().prepareNodesInfo().execute().actionGet();
-        final boolean anyDebian8Nodes = response.getNodes()
-            .stream()
-            .anyMatch(ni -> ni.getInfo(OsInfo.class).getPrettyName().equals("Debian GNU/Linux 8 (jessie)"));
-        boolean java15Plus = JavaVersion.current().compareTo(JavaVersion.parse("15")) >= 0;
-        return anyDebian8Nodes && java15Plus == false;
-    }
 }

x-pack/plugin/autoscaling/src/internalClusterTest/java/org/elasticsearch/xpack/autoscaling/action/TransportGetAutoscalingCapacityActionIT.java

@@ -34,9 +34,6 @@
 public class TransportGetAutoscalingCapacityActionIT extends AutoscalingIntegTestCase {
 
     public void testCurrentCapacity() throws Exception {
-        // see: https://github.com/elastic/elasticsearch/issues/67089#issuecomment-756114654
-        assumeFalse("cannot run on debian 8 prior to java 15", willSufferDebian8MemoryProblem());
-
         assertThat(capacity().results().keySet(), Matchers.empty());
         long memory = OsProbe.getInstance().getTotalPhysicalMemorySize();
         long storage = internalCluster().getInstance(NodeEnvironment.class).nodePaths()[0].fileStore.getTotalSpace();

x-pack/plugin/ml/src/internalClusterTest/java/org/elasticsearch/xpack/ml/integration/BasicDistributedJobsIT.java

@@ -452,10 +452,6 @@ public void testMlStateAndResultsIndicesNotAvailable() throws Exception {
     }
 
     public void testCloseUnassignedLazyJobAndDatafeed() throws Exception {
-
-        // see: https://github.com/elastic/elasticsearch/issues/66885#issuecomment-758790179
-        assumeFalse("cannot run on debian 8 prior to java 15", willSufferDebian8MemoryProblem());
-
         internalCluster().ensureAtLeastNumDataNodes(3);
         ensureStableCluster(3);
 

x-pack/plugin/ml/src/internalClusterTest/java/org/elasticsearch/xpack/ml/integration/MlDistributedFailureIT.java

@@ -410,10 +410,6 @@ public void testStopAndForceStopDatafeed() throws Exception {
     }
 
     public void testJobRelocationIsMemoryAware() throws Exception {
-
-        // see: https://github.com/elastic/elasticsearch/issues/66885#issuecomment-758790179
-        assumeFalse("cannot run on debian 8 prior to java 15", willSufferDebian8MemoryProblem());
-
         internalCluster().ensureAtLeastNumDataNodes(1);
         ensureStableCluster();
 

x-pack/plugin/ml/src/internalClusterTest/java/org/elasticsearch/xpack/ml/integration/TooManyJobsIT.java

@@ -127,14 +127,10 @@ public void testLazyNodeValidation() throws Exception {
     }
 
     public void testSingleNode() throws Exception {
-        // see: https://github.com/elastic/elasticsearch/issues/66885#issuecomment-758790179
-        assumeFalse("cannot run on debian 8 prior to java 15", willSufferDebian8MemoryProblem());
         verifyMaxNumberOfJobsLimit(1, randomIntBetween(1, 20), randomBoolean());
     }
 
     public void testMultipleNodes() throws Exception {
-        // see: https://github.com/elastic/elasticsearch/issues/66885#issuecomment-758790179
-        assumeFalse("cannot run on debian 8 prior to java 15", willSufferDebian8MemoryProblem());
         verifyMaxNumberOfJobsLimit(3, randomIntBetween(1, 20), randomBoolean());
     }