diff --git a/src/main/java/org/elasticsearch/index/engine/InternalEngine.java b/src/main/java/org/elasticsearch/index/engine/InternalEngine.java
index b914dfe6d06..2c4d31edd4c 100644
--- a/src/main/java/org/elasticsearch/index/engine/InternalEngine.java
+++ b/src/main/java/org/elasticsearch/index/engine/InternalEngine.java
@@ -621,7 +621,9 @@ public class InternalEngine extends Engine {
                             long translogId = translogIdGenerator.incrementAndGet();
                             translog.newTransientTranslog(translogId);
                             indexWriter.setCommitData(Collections.singletonMap(Translog.TRANSLOG_ID_KEY, Long.toString(translogId)));
+                            logger.trace("starting commit for flush");
                             commitIndexWriter(indexWriter);
+                            logger.trace("finished commit for flush");
                             // we need to refresh in order to clear older version values
                             refresh("version_table_flush");
                             // we need to move transient to current only after we refresh