X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-distributed-datastore%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fdatastore%2FShardDataTree.java;h=7b317faaee8619bdcd590cbf11ea59ca6e014b61;hb=6602310b78b5bf54899456e2efa867d116731267;hp=694be4d1d16ac1e723359531fac964908bfdc3f3;hpb=04ce3cfa566f7667800abb376d533f41246ff909;p=controller.git

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardDataTree.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardDataTree.java
index 694be4d1d1..7b317faaee 100644
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardDataTree.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardDataTree.java
@@ -787,8 +787,12 @@ public class ShardDataTree extends ShardDataTreeTransactionParent {
     }
 
     void startCanCommit(final SimpleShardDataTreeCohort cohort) {
-        final SimpleShardDataTreeCohort current = pendingTransactions.peek().cohort;
-        if (!cohort.equals(current)) {
+        final CommitEntry head = pendingTransactions.peek();
+        if (head == null) {
+            LOG.warn("{}: No transactions enqueued while attempting to start canCommit on {}", logContext, cohort);
+            return;
+        }
+        if (!cohort.equals(head.cohort)) {
             LOG.debug("{}: Transaction {} scheduled for canCommit step", logContext, cohort.getIdentifier());
             return;
         }