Tolerate benign log4j status messages in tests (#81851)

Tolerate either 1) the absence or, 2) the denial, of the JNDI lookup class

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

@@ -147,9 +147,13 @@ import java.util.stream.Stream;
 
 import static java.util.Collections.emptyMap;
 import static org.elasticsearch.common.util.CollectionUtils.arrayAsArrayList;
+import static org.hamcrest.Matchers.anyOf;
+import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.empty;
+import static org.hamcrest.Matchers.emptyCollectionOf;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.hasItem;
+import static org.hamcrest.Matchers.startsWith;
 
 /**
  * Base testcase for randomized unit testing with Elasticsearch
@@ -600,6 +604,15 @@ public abstract class ESTestCase extends LuceneTestCase {
         });
     }
 
+    // Tolerate the absence or otherwise denial of these specific lookup classes.
+    // At some future time, we should require the JDNI warning.
+    private static final List<String> LOG_4J_MSG_PREFIXES = List.of(
+        "JNDI lookup class is not available because this JRE does not support JNDI. "
+            + "JNDI string lookups will not be available, continuing configuration.",
+        "JMX runtime input lookup class is not available because this JRE does not support JMX. "
+            + "JMX lookups will not be available, continuing configuration. "
+    );
+
     // separate method so that this can be checked again after suite scoped cluster is shut down
     protected static void checkStaticState() throws Exception {
         LeakTracker.INSTANCE.reportLeak();
@@ -613,7 +626,10 @@ public abstract class ESTestCase extends LuceneTestCase {
                 // StatusData instances to Strings as otherwise their toString output is useless
                 assertThat(
                     statusData.stream().map(status -> status.getMessage().getFormattedMessage()).collect(Collectors.toList()),
-                    empty()
+                    anyOf(
+                        emptyCollectionOf(String.class),
+                        contains(startsWith(LOG_4J_MSG_PREFIXES.get(0)), startsWith(LOG_4J_MSG_PREFIXES.get(1)))
+                    )
                 );
             } finally {
                 // we clear the list so that status data from other tests do not interfere with tests within the same JVM