HBASE-8380 NPE in HBaseClient.readResponse

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1471271 13f79535-47bb-0310-9956-ffa450edef68

hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/HBaseClient.java

@@ -392,7 +392,7 @@ public class HBaseClient {
 
       if (LOG.isDebugEnabled()) {
         LOG.debug("Use " + authMethod + " authentication for protocol "
-            + protocol.getSimpleName());
+            + (protocol == null ? "null" : protocol.getSimpleName()));
       }
       reloginMaxBackoff = conf.getInt("hbase.security.relogin.maxbackoff", 5000);
       this.remoteId = remoteId;
@@ -811,7 +811,7 @@ public class HBaseClient {
                 ticket = ticket.getRealUser();
               }
             }
-            boolean continueSasl = false;
+            boolean continueSasl;
             try {
               if (ticket == null) {
                 throw new NullPointerException("ticket is null");
@@ -855,7 +855,7 @@ public class HBaseClient {
         }
       } catch (Throwable t) {
         failedServers.addToFailedServers(remoteId.address);
-        IOException e = null;
+        IOException e;
         if (t instanceof IOException) {
           e = (IOException)t;
           markClosed(e);
@@ -1007,7 +1007,8 @@ public class HBaseClient {
             if (call != null) call.setException(re);
           }
         } else {
-          Message rpcResponseType;
+          Message rpcResponseType = null;
+          if (call != null){
             try {
               // TODO: Why pb engine pollution in here in this class?  FIX.
               rpcResponseType =
@@ -1016,6 +1017,7 @@ public class HBaseClient {
             } catch (Exception e) {
               throw new RuntimeException(e); //local exception
             }
+          }
           Message value = null;
           if (rpcResponseType != null) {
             Builder builder = rpcResponseType.newBuilderForType();