Work around JDK8 timezone bug in tests (#37968)

The timezone GMT0 cannot be properly parsed on java8.
The randomZone() method now excludes GMT0, if java8 is used.

Closes #37814

Author: spinscale

server/src/test/java/org/elasticsearch/search/query/SearchQueryIT.java

@@ -426,14 +426,11 @@ public void testDateRangeInQueryString() {
         assertThat(e.toString(), containsString("unit [D] not supported for date math"));
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/37814")
     // Issue #7880
     public void testDateRangeInQueryStringWithTimeZone_7880() {
         //the mapping needs to be provided upfront otherwise we are not sure how many failures we get back
         //as with dynamic mappings some shards might be lacking behind and parse a different query
-        assertAcked(prepareCreate("test").addMapping(
-                "type", "past", "type=date"
-        ));
+        assertAcked(prepareCreate("test").addMapping("type", "past", "type=date"));
 
         ZoneId timeZone = randomZone();
         String now = DateFormatter.forPattern("strict_date_optional_time").format(Instant.now().atZone(timeZone));

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

@@ -48,6 +48,7 @@
 import org.apache.lucene.util.TimeUnits;
 import org.elasticsearch.Version;
 import org.elasticsearch.bootstrap.BootstrapForTesting;
+import org.elasticsearch.bootstrap.JavaVersion;
 import org.elasticsearch.client.Requests;
 import org.elasticsearch.cluster.ClusterModule;
 import org.elasticsearch.cluster.metadata.IndexMetaData;
@@ -784,7 +785,17 @@ public static TimeZone randomTimeZone() {
      * generate a random TimeZone from the ones available in java.time
      */
     public static ZoneId randomZone() {
-        return ZoneId.of(randomFrom(JAVA_ZONE_IDS));
+        // work around a JDK bug, where java 8 cannot parse the timezone GMT0 back into a temporal accessor
+        // see https://bugs.openjdk.java.net/browse/JDK-8138664
+        if (JavaVersion.current().getVersion().get(0) == 8) {
+            ZoneId timeZone;
+            do {
+                timeZone = ZoneId.of(randomFrom(JAVA_ZONE_IDS));
+            } while (timeZone.equals(ZoneId.of("GMT0")));
+            return timeZone;
+        } else {
+            return ZoneId.of(randomFrom(JAVA_ZONE_IDS));
+        }
     }
 
     /**