diff --git a/server/src/main/java/org/opensearch/rest/BaseRestHandler.java b/server/src/main/java/org/opensearch/rest/BaseRestHandler.java
index d53b55cc373e5..fc150405747ec 100644
--- a/server/src/main/java/org/opensearch/rest/BaseRestHandler.java
+++ b/server/src/main/java/org/opensearch/rest/BaseRestHandler.java
@@ -122,9 +122,6 @@ public final void handleRequest(RestRequest request, RestChannel channel, NodeCl
             throw new IllegalArgumentException(unrecognized(request, unconsumedParams, candidateParams, "parameter"));
         }
 
-        // ignore whether content is consumed
-        // https://github.com/opensearch-project/OpenSearch/issues/13011
-
         usageCount.increment();
         // execute the action
         action.accept(channel);
diff --git a/server/src/main/java/org/opensearch/rest/action/admin/indices/RestForceMergeAction.java b/server/src/main/java/org/opensearch/rest/action/admin/indices/RestForceMergeAction.java
index 373ea8a7baed6..f3e66bd20cd86 100644
--- a/server/src/main/java/org/opensearch/rest/action/admin/indices/RestForceMergeAction.java
+++ b/server/src/main/java/org/opensearch/rest/action/admin/indices/RestForceMergeAction.java
@@ -71,10 +71,7 @@ public String getName() {
 
     @Override
     public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
-        if (request.hasContent()) {
-            throw new IllegalArgumentException("forcemerge takes arguments in query parameters, not in the request body");
-        }
-        ForceMergeRequest mergeRequest = new ForceMergeRequest(Strings.splitStringByCommaToArray(request.param("index")));
+        final ForceMergeRequest mergeRequest = new ForceMergeRequest(Strings.splitStringByCommaToArray(request.param("index")));
         mergeRequest.indicesOptions(IndicesOptions.fromRequest(request, mergeRequest.indicesOptions()));
         mergeRequest.maxNumSegments(request.paramAsInt("max_num_segments", mergeRequest.maxNumSegments()));
         mergeRequest.onlyExpungeDeletes(request.paramAsBoolean("only_expunge_deletes", mergeRequest.onlyExpungeDeletes()));
diff --git a/server/src/test/java/org/opensearch/action/admin/indices/forcemerge/RestForceMergeActionTests.java b/server/src/test/java/org/opensearch/action/admin/indices/forcemerge/RestForceMergeActionTests.java
index 3d281bc4e83b7..fa74cbbe3cf70 100644
--- a/server/src/test/java/org/opensearch/action/admin/indices/forcemerge/RestForceMergeActionTests.java
+++ b/server/src/test/java/org/opensearch/action/admin/indices/forcemerge/RestForceMergeActionTests.java
@@ -57,20 +57,6 @@ public void setUpAction() {
         controller().registerHandler(new RestForceMergeAction());
     }
 
-    public void testBodyRejection() throws Exception {
-        final RestForceMergeAction handler = new RestForceMergeAction();
-        String json = JsonXContent.contentBuilder().startObject().field("max_num_segments", 1).endObject().toString();
-        final FakeRestRequest request = new FakeRestRequest.Builder(NamedXContentRegistry.EMPTY).withContent(
-            new BytesArray(json),
-            MediaTypeRegistry.JSON
-        ).withPath("/_forcemerge").build();
-        IllegalArgumentException e = expectThrows(
-            IllegalArgumentException.class,
-            () -> handler.handleRequest(request, new FakeRestChannel(request, randomBoolean(), 1), mock(NodeClient.class))
-        );
-        assertThat(e.getMessage(), equalTo("forcemerge takes arguments in query parameters, not in the request body"));
-    }
-
     public void testDeprecationMessage() {
         final Map<String, String> params = new HashMap<>();
         params.put("only_expunge_deletes", Boolean.TRUE.toString());