docs( Configuration_Client.md): polish definite article and indefinite article

docs/en/Configuration_Client.md

@@ -25,7 +25,7 @@ export   NAMESRV_ADDR=192.168.0.1:9876;192.168.0.2:9876
 ```
 - HTTP static server addressing(default)
 
-After client started, it will access a http static server address, as: <http://jmenv.tbsite.net:8080/rocketmq/nsaddr>, this URL return the following contents:
+After client started, it will access the http static server address, as: <http://jmenv.tbsite.net:8080/rocketmq/nsaddr>, this URL return the following contents:
 
 ```text
 192.168.0.1:9876;192.168.0.2:9876   

openmessaging/src/main/java/io/openmessaging/rocketmq/consumer/LocalMessageCache.java

@@ -73,7 +73,7 @@ class LocalMessageCache implements ServiceLifecycle {
                 pullOffsetTable.putIfAbsent(remoteQueue,
                     rocketmqPullConsumer.fetchConsumeOffset(remoteQueue, false));
             } catch (MQClientException e) {
-                log.error("A error occurred in fetch consume offset process.", e);
+                log.error("An error occurred in fetch consume offset process.", e);
             }
         }
         return pullOffsetTable.get(remoteQueue);
@@ -124,7 +124,7 @@ class LocalMessageCache implements ServiceLifecycle {
             try {
                 rocketmqPullConsumer.updateConsumeOffset(consumeRequest.getMessageQueue(), offset);
             } catch (MQClientException e) {
-                log.error("A error occurred in update consume offset process.", e);
+                log.error("An error occurred in update consume offset process.", e);
             }
         }
     }
@@ -135,7 +135,7 @@ class LocalMessageCache implements ServiceLifecycle {
         try {
             rocketmqPullConsumer.updateConsumeOffset(messageQueue, offset);
         } catch (MQClientException e) {
-            log.error("A error occurred in update consume offset process.", e);
+            log.error("An error occurred in update consume offset process.", e);
         }
     }
 

openmessaging/src/main/java/io/openmessaging/rocketmq/consumer/PullConsumerImpl.java

@@ -167,7 +167,7 @@ public class PullConsumerImpl implements PullConsumer {
                     }
                     localMessageCache.updatePullOffset(mq, pullResult.getNextBeginOffset());
                 } catch (Exception e) {
-                    log.error("A error occurred in pull message process.", e);
+                    log.error("An error occurred in pull message process.", e);
                 }
             }
         });

remoting/src/main/java/org/apache/rocketmq/remoting/netty/NettyRemotingServer.java

@@ -373,7 +373,7 @@ public class NettyRemotingServer extends NettyRemotingAbstract implements Remoti
                 switch (tlsMode) {
                     case DISABLED:
                         ctx.close();
-                        log.warn("Clients intend to establish a SSL connection while this server is running in SSL disabled mode");
+                        log.warn("Clients intend to establish an SSL connection while this server is running in SSL disabled mode");
                         break;
                     case PERMISSIVE:
                     case ENFORCING:
@@ -384,7 +384,7 @@ public class NettyRemotingServer extends NettyRemotingAbstract implements Remoti
                             log.info("Handlers prepended to channel pipeline to establish SSL connection");
                         } else {
                             ctx.close();
-                            log.error("Trying to establish a SSL connection but sslContext is null");
+                            log.error("Trying to establish an SSL connection but sslContext is null");
                         }
                         break;