use sync update leader

Signed-off-by: iosmanthus <myosmanthustree@gmail.com>

Author: iosmanthus

src/main/java/org/tikv/common/AbstractGRPCClient.java

@@ -204,8 +204,6 @@ protected boolean checkHealth(BackOffer backOffer, String addressStr, HostMappin
     SlowLogSpan checkHealthSpan = backOffer.getSlowLog().start("check_health");
     try {
       return doCheckHealth(backOffer, addressStr, hostMapping);
-    } catch (Exception e) {
-      return false;
     } finally {
       checkHealthSpan.end();
     }

src/main/java/org/tikv/common/PDClient.java

@@ -469,8 +469,6 @@ private GetMembersResponse getMembers(BackOffer backOffer, URI uri) {
     SlowLogSpan getMembersSpan = backOffer.getSlowLog().start("get_members");
     try {
       return doGetMembers(backOffer, uri);
-    } catch (Exception e) {
-      return null;
     } finally {
       getMembersSpan.end();
     }
@@ -527,7 +525,7 @@ synchronized boolean createFollowerClientWrapper(
 
   public void tryUpdateLeaderOrForwardFollower(BackOffer backOffer) {
     if (leaderLock.tryLock()) {
-      SlowLogSpan updateLeaderSpan = backOffer.getSlowLog().start("try_update_leader");
+      SlowLogSpan updateLeaderSpan = backOffer.getSlowLog().start("update_leader");
       try {
         updateLeaderOrForwardFollower(backOffer);
       } finally {

src/main/java/org/tikv/common/operation/PDErrorHandler.java

@@ -86,7 +86,7 @@ public boolean handleRequestError(BackOffer backOffer, Exception e) {
       return false;
     }
     backOffer.doBackOff(BackOffFunction.BackOffFuncType.BoPDRPC, e);
-    SlowLogSpan updateLeaderSpan = backOffer.getSlowLog().start("update_leader");
+    SlowLogSpan updateLeaderSpan = backOffer.getSlowLog().start("try_update_leader");
     try {
       client.tryUpdateLeaderOrForwardFollower(backOffer);
     } finally {