fix and opt for some exceptions process (#262)

* add log info for ObTableConnectionUnWritableException

* remove assert

* remove assert

Author: GroundWu

src/main/java/com/alipay/oceanbase/rpc/bolt/transport/ObTableConnection.java

@@ -259,7 +259,7 @@ public void reConnectAndLogin(String msg) throws ObTableException {
         } catch (ObTableServerConnectException ex) {
             throw ex;
         } catch (Exception ex) {
-            throw new ObTableConnectionStatusException("check status failed", ex);
+            throw new ObTableConnectionStatusException("check status failed, cause: " + ex.getMessage(), ex);
         }
     }
 

src/main/java/com/alipay/oceanbase/rpc/table/ObTable.java

@@ -391,7 +391,7 @@ public ObPayload execute(final ObPayload request) throws RemotingException,
         } catch (ObTableServerConnectException ex) {
             throw ex;
         } catch (Exception ex) {
-            throw new ObTableConnectionStatusException("check status failed", ex);
+            throw new ObTableConnectionStatusException("check status failed, cause: " + ex.getMessage(), ex);
         }
         return executeWithReconnect(connection, request);
     }
@@ -455,7 +455,7 @@ public ObPayload executeWithConnection(final ObPayload request,
         } catch (ObTableServerConnectException ex) {
             throw ex;
         } catch (Exception ex) {
-            throw new ObTableConnectionStatusException("check status failed", ex);
+            throw new ObTableConnectionStatusException("check status failed, cause: " + ex.getMessage(), ex);
         }
         return executeWithReconnect(connection, request);
     }

src/main/java/com/alipay/oceanbase/rpc/table/ObTableClientBatchOpsImpl.java

@@ -398,17 +398,14 @@ public void partitionExecute(ObTableOperationResult[] results,
             } catch (Exception ex) {
                 if (obTableClient.isOdpMode()) {
                     if ((tryTimes - 1) < obTableClient.getRuntimeRetryTimes()) {
-                        assert ex instanceof ObTableException;
                         logger
                             .warn(
-                                "batch ops execute while meet Exception, tablename:{}, errorCode: {} , errorMsg: {}, try times {}",
-                                tableName, ((ObTableException) ex).getErrorCode(), ex.getMessage(),
+                                "batch ops execute while meet Exception, tablename:{}, errorMsg: {}, try times {}",
+                                tableName, ex.getMessage(),
                                 tryTimes);
                         if (ex instanceof ObTablePartitionChangeException
                             && ((ObTablePartitionChangeException) ex).getErrorCode() == ResultCodes.OB_ERR_KV_ROUTE_ENTRY_EXPIRE.errorCode) {
                             odpNeedRenew = true;
-                        } else {
-                            throw ex;
                         }
                     } else {
                         RUNTIME.error("retry fail when normal batch executing", ex);