[ISSUE #142] fix replica cannot be synced (#143)

Signed-off-by: zhangyang21 <zhangyang21@xiaomi.com>

Author: Git-Yang

src/main/java/io/openmessaging/storage/dledger/DLedgerEntryPusher.java

@@ -970,6 +970,7 @@ private void handleDoBatchAppend(long writeIndex, PushEntryRequest request,
                 updateCommittedIndex(request.getTerm(), request.getCommitIndex());
             } catch (Throwable t) {
                 logger.error("[HandleDoBatchAppend]", t);
+                future.complete(buildResponse(request, DLedgerResponseCode.INCONSISTENT_STATE.getCode()));
             }
 
         }