diff --git a/WORKSPACE b/WORKSPACE
index e29256e..3b46d22 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -453,84 +453,84 @@
     sha1 = "18a9a2ce6abf32ea1b5fd31dae5210ad93f4e5e3",
 )
 
-LUCENE_VERS = "5.5.2"
+LUCENE_VERS = "5.5.4"
 
 maven_jar(
     name = "lucene_core",
     artifact = "org.apache.lucene:lucene-core:" + LUCENE_VERS,
-    sha1 = "de5e5c3161ea01e89f2a09a14391f9b7ed66cdbb",
+    sha1 = "ab9c77e75cf142aa6e284b310c8395617bd9b19b",
 )
 
 maven_jar(
     name = "lucene_analyzers_common",
     artifact = "org.apache.lucene:lucene-analyzers-common:" + LUCENE_VERS,
-    sha1 = "f0bc3114a6b43f8e64a33c471d5b9e8ddc51564d",
+    sha1 = "08ce9d34c8124c80e176e8332ee947480bbb9576",
 )
 
 maven_jar(
     name = "lucene_codecs",
     artifact = "org.apache.lucene:lucene-codecs:" + LUCENE_VERS,
-    sha1 = "e01fe463d9490bb1b4a6a168e771f7b7255a50b1",
+    sha1 = "afdad570668469b1734fbd32b8f98561561bed48",
 )
 
 maven_jar(
     name = "backward_codecs",
     artifact = "org.apache.lucene:lucene-backward-codecs:" + LUCENE_VERS,
-    sha1 = "c5cfcd7a8cf48a0144b61fb991c8e50a0bf868d5",
+    sha1 = "a933f42e758c54c43083398127ea7342b54d8212",
 )
 
 maven_jar(
     name = "lucene_misc",
     artifact = "org.apache.lucene:lucene-misc:" + LUCENE_VERS,
-    sha1 = "37bbe5a2fb429499dfbe75d750d1778881fff45d",
+    sha1 = "a74388857f73614e528ae44d742c60187cb55a5a",
 )
 
 maven_jar(
     name = "lucene_queryparser",
     artifact = "org.apache.lucene:lucene-queryparser:" + LUCENE_VERS,
-    sha1 = "8ac921563e744463605284c6d9d2d95e1be5b87c",
+    sha1 = "8a06fad4675473d98d93b61fea529e3f464bf69e",
 )
 
 maven_jar(
     name = "lucene_highlighter",
     artifact = "org.apache.lucene:lucene-highlighter:" + LUCENE_VERS,
-    sha1 = "d127ac514e9df965ab0b57d92bbe0c68d3d145b8",
+    sha1 = "433f53f03f1b14337c08d54e507a5410905376fa",
 )
 
 maven_jar(
     name = "lucene_join",
     artifact = "org.apache.lucene:lucene-join:" + LUCENE_VERS,
-    sha1 = "dac1b322508f3f2696ecc49a97311d34d8382054",
+    sha1 = "23f9a909a244ed3b28b37c5bb21a6e33e6c0a339",
 )
 
 maven_jar(
     name = "lucene_memory",
     artifact = "org.apache.lucene:lucene-memory:" + LUCENE_VERS,
-    sha1 = "7409db9863d8fbc265c27793c6cc7511304182c2",
+    sha1 = "4dbdc2e1a24837722294762a9edb479f79092ab9",
 )
 
 maven_jar(
     name = "lucene_sandbox",
     artifact = "org.apache.lucene:lucene-sandbox:" + LUCENE_VERS,
-    sha1 = "30a91f120706ba66732d5a974b56c6971b3c8a16",
+    sha1 = "49498bbb2adc333e98bdca4bf6170ae770cbad11",
 )
 
 maven_jar(
     name = "lucene_spatial",
     artifact = "org.apache.lucene:lucene-spatial:" + LUCENE_VERS,
-    sha1 = "8ed7a9a43d78222038573dd1c295a61f3c0bb0db",
+    sha1 = "0217d302dc0ef4d9b8b475ffe327d83c1e0ceba5",
 )
 
 maven_jar(
     name = "lucene_suggest",
     artifact = "org.apache.lucene:lucene-suggest:" + LUCENE_VERS,
-    sha1 = "e8316b37dddcf2092a54dab2ce6aad0d5ad78585",
+    sha1 = "0f46dbb3229eed62dff10d008172c885e0e028c8",
 )
 
 maven_jar(
     name = "lucene_queries",
     artifact = "org.apache.lucene:lucene-queries:" + LUCENE_VERS,
-    sha1 = "692f1ad887cf4e006a23f45019e6de30f3312d3f",
+    sha1 = "f915357b8b4b43742ab48f1401dedcaa12dfa37a",
 )
 
 maven_jar(
@@ -925,8 +925,8 @@
 
 maven_jar(
     name = "elasticsearch",
-    artifact = "org.elasticsearch:elasticsearch:2.4.4",
-    sha1 = "e69930bc794c539d34778e665d6f8ccbffd42c6f",
+    artifact = "org.elasticsearch:elasticsearch:2.4.5",
+    sha1 = "daafe48ae06592029a2fedca1fe2ac0f5eec3185",
 )
 
 # Java REST client for Elasticsearch.
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/ChangeJson.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/ChangeJson.java
index 2282c79..d197a2c 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/ChangeJson.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/ChangeJson.java
@@ -517,8 +517,7 @@
       Collection<String> stars = cd.stars(user.getAccountId());
       out.starred = stars.contains(StarredChangesUtil.DEFAULT_LABEL) ? true : null;
       out.muted =
-          stars.contains(
-                  StarredChangesUtil.MUTE_LABEL + "/" + cd.currentPatchSet().getPatchSetId())
+          stars.contains(StarredChangesUtil.MUTE_LABEL + "/" + cd.currentPatchSet().getPatchSetId())
               ? true
               : null;
       if (!stars.isEmpty()) {
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/Mergeable.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/Mergeable.java
index e5f9352..69f26b2 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/Mergeable.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/Mergeable.java
@@ -25,6 +25,7 @@
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.reviewdb.server.ReviewDbUtil;
+import com.google.gerrit.server.ChangeUtil;
 import com.google.gerrit.server.git.BranchOrderSection;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.git.MergeUtil;
@@ -98,7 +99,7 @@
     MergeableInfo result = new MergeableInfo();
 
     if (!change.getStatus().isOpen()) {
-      throw new ResourceConflictException("change is " + Submit.status(change));
+      throw new ResourceConflictException("change is " + ChangeUtil.status(change));
     } else if (!ps.getId().equals(change.currentPatchSetId())) {
       // Only the current revision is mergeable. Others always fail.
       return result;
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/Move.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/Move.java
index fb6ae0b..ec494ce 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/Move.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/Move.java
@@ -33,6 +33,7 @@
 import com.google.gerrit.reviewdb.client.RefNames;
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ChangeMessagesUtil;
+import com.google.gerrit.server.ChangeUtil;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.git.GitRepositoryManager;
 import com.google.gerrit.server.notedb.ChangeUpdate;
@@ -115,7 +116,7 @@
         throws OrmException, ResourceConflictException, RepositoryNotFoundException, IOException {
       change = ctx.getChange();
       if (change.getStatus() != Status.NEW && change.getStatus() != Status.DRAFT) {
-        throw new ResourceConflictException("Change is " + status(change));
+        throw new ResourceConflictException("Change is " + ChangeUtil.status(change));
       }
 
       Project.NameKey projectKey = change.getProject();
@@ -182,8 +183,4 @@
       return true;
     }
   }
-
-  private static String status(Change change) {
-    return change != null ? change.getStatus().name().toLowerCase() : "deleted";
-  }
 }
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/PatchSetInserter.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/PatchSetInserter.java
index 32dbcda..5933b19 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/PatchSetInserter.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/PatchSetInserter.java
@@ -34,6 +34,7 @@
 import com.google.gerrit.server.ApprovalCopier;
 import com.google.gerrit.server.ApprovalsUtil;
 import com.google.gerrit.server.ChangeMessagesUtil;
+import com.google.gerrit.server.ChangeUtil;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.ReviewerSet;
 import com.google.gerrit.server.events.CommitReceivedEvent;
@@ -224,7 +225,7 @@
       throw new ResourceConflictException(
           String.format(
               "Cannot create new patch set of change %s because it is %s",
-              change.getId(), change.getStatus().name().toLowerCase()));
+              change.getId(), ChangeUtil.status(change)));
     }
 
     List<String> newGroups = groups;
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/PreviewSubmit.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/PreviewSubmit.java
index 42dba3f..a074818 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/PreviewSubmit.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/PreviewSubmit.java
@@ -27,6 +27,7 @@
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.reviewdb.client.RefNames;
 import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.ChangeUtil;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.change.LimitedByteArrayOutputStream.LimitExceededException;
 import com.google.gerrit.server.config.GerritServerConfig;
@@ -96,7 +97,7 @@
 
     Change change = rsrc.getChange();
     if (!change.getStatus().isOpen()) {
-      throw new PreconditionFailedException("change is " + Submit.status(change));
+      throw new PreconditionFailedException("change is " + ChangeUtil.status(change));
     }
     ChangeControl control = rsrc.getControl();
     if (!control.getUser().isIdentifiedUser()) {
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/Rebase.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/Rebase.java
index 2f20f58..b866489 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/Rebase.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/Rebase.java
@@ -31,6 +31,7 @@
 import com.google.gerrit.reviewdb.client.Change.Status;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.server.ReviewDb;
+import com.google.gerrit.server.ChangeUtil;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.change.RebaseUtil.Base;
 import com.google.gerrit.server.git.GitRepositoryManager;
@@ -101,7 +102,7 @@
             updateFactory.create(
                 dbProvider.get(), change.getProject(), rsrc.getUser(), TimeUtil.nowTs())) {
       if (!change.getStatus().isOpen()) {
-        throw new ResourceConflictException("change is " + change.getStatus().name().toLowerCase());
+        throw new ResourceConflictException("change is " + ChangeUtil.status(change));
       } else if (!hasOneParent(rw, rsrc.getPatchSet())) {
         throw new ResourceConflictException(
             "cannot rebase merge commits or commit with no ancestor");
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/Restore.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/Restore.java
index aa3f56d..b362472 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/Restore.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/Restore.java
@@ -28,6 +28,7 @@
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ChangeMessagesUtil;
+import com.google.gerrit.server.ChangeUtil;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.extensions.events.ChangeRestored;
 import com.google.gerrit.server.mail.send.ReplyToChangeSender;
@@ -109,7 +110,7 @@
     public boolean updateChange(ChangeContext ctx) throws OrmException, ResourceConflictException {
       change = ctx.getChange();
       if (change == null || change.getStatus() != Status.ABANDONED) {
-        throw new ResourceConflictException("change is " + status(change));
+        throw new ResourceConflictException("change is " + ChangeUtil.status(change));
       }
       PatchSet.Id psId = change.currentPatchSetId();
       ChangeUpdate update = ctx.getUpdate(psId);
@@ -157,8 +158,4 @@
             rsrc.getChange().getStatus() == Status.ABANDONED
                 && rsrc.permissions().database(dbProvider).testOrFalse(ChangePermission.RESTORE));
   }
-
-  private static String status(Change change) {
-    return change != null ? change.getStatus().name().toLowerCase() : "deleted";
-  }
 }
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/Revert.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/Revert.java
index 1d69a7b..14e55c5 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/Revert.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/Revert.java
@@ -34,6 +34,7 @@
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ApprovalsUtil;
 import com.google.gerrit.server.ChangeMessagesUtil;
+import com.google.gerrit.server.ChangeUtil;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.GerritPersonIdent;
 import com.google.gerrit.server.PatchSetUtil;
@@ -133,7 +134,7 @@
     if (!refControl.canUpload()) {
       throw new AuthException("revert not permitted");
     } else if (change.getStatus() != Status.MERGED) {
-      throw new ResourceConflictException("change is " + status(change));
+      throw new ResourceConflictException("change is " + ChangeUtil.status(change));
     }
 
     Change.Id revertedChangeId = revert(req.getControl(), Strings.emptyToNull(input.message));
@@ -233,10 +234,6 @@
                 && resource.getControl().getRefControl().canUpload());
   }
 
-  private static String status(Change change) {
-    return change != null ? change.getStatus().name().toLowerCase() : "deleted";
-  }
-
   private class NotifyOp implements BatchUpdateOp {
     private final Change change;
     private final ChangeInserter ins;
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/change/Submit.java b/gerrit-server/src/main/java/com/google/gerrit/server/change/Submit.java
index 419d7ab..3e489da 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/change/Submit.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/change/Submit.java
@@ -40,6 +40,7 @@
 import com.google.gerrit.reviewdb.client.RevId;
 import com.google.gerrit.reviewdb.server.ReviewDb;
 import com.google.gerrit.server.ChangeMessagesUtil;
+import com.google.gerrit.server.ChangeUtil;
 import com.google.gerrit.server.CurrentUser;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.PatchSetUtil;
@@ -210,7 +211,7 @@
 
     Change change = rsrc.getChange();
     if (!change.getStatus().isOpen()) {
-      throw new ResourceConflictException("change is " + status(change));
+      throw new ResourceConflictException("change is " + ChangeUtil.status(change));
     } else if (!ProjectUtil.branchExists(repoManager, change.getDest())) {
       throw new ResourceConflictException(
           String.format("destination branch \"%s\" not found.", change.getDest().get()));
@@ -244,7 +245,7 @@
       case ABANDONED:
       case DRAFT:
       default:
-        throw new ResourceConflictException("change is " + status(change));
+        throw new ResourceConflictException("change is " + ChangeUtil.status(change));
     }
   }
 
@@ -404,10 +405,6 @@
         .orNull();
   }
 
-  static String status(Change change) {
-    return change != null ? change.getStatus().name().toLowerCase() : "deleted";
-  }
-
   public Collection<ChangeData> unmergeableChanges(ChangeSet cs) throws OrmException, IOException {
     Set<ChangeData> mergeabilityMap = new HashSet<>();
     for (ChangeData change : cs.changes()) {
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/git/AbandonOp.java b/gerrit-server/src/main/java/com/google/gerrit/server/git/AbandonOp.java
index c5376fd..f4185c9 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/git/AbandonOp.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/git/AbandonOp.java
@@ -25,6 +25,7 @@
 import com.google.gerrit.reviewdb.client.ChangeMessage;
 import com.google.gerrit.reviewdb.client.PatchSet;
 import com.google.gerrit.server.ChangeMessagesUtil;
+import com.google.gerrit.server.ChangeUtil;
 import com.google.gerrit.server.PatchSetUtil;
 import com.google.gerrit.server.extensions.events.ChangeAbandoned;
 import com.google.gerrit.server.mail.send.AbandonedSender;
@@ -96,7 +97,7 @@
     PatchSet.Id psId = change.currentPatchSetId();
     ChangeUpdate update = ctx.getUpdate(psId);
     if (!change.getStatus().isOpen()) {
-      throw new ResourceConflictException("change is " + status(change));
+      throw new ResourceConflictException("change is " + ChangeUtil.status(change));
     } else if (change.getStatus() == Change.Status.DRAFT) {
       throw new ResourceConflictException("draft changes cannot be abandoned");
     }
@@ -137,8 +138,4 @@
     }
     changeAbandoned.fire(change, patchSet, account, msgTxt, ctx.getWhen(), notifyHandling);
   }
-
-  private static String status(Change change) {
-    return change != null ? change.getStatus().name().toLowerCase() : "deleted";
-  }
 }