HDFS-15940. Error log for replica recovery failure

Author: virajjasani

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBlockRecovery2.java

@@ -257,6 +257,7 @@ public void testRaceBetweenReplicaRecoveryAndFinalizeBlock()
             dataNode.initReplicaRecovery(recoveringBlock);
           }
         } catch (Exception e) {
+          LOG.error("Something went wrong.", e);
           recoveryInitResult.set(false);
         }
       });