[Fix] obtable init check

README.md

@@ -18,7 +18,7 @@ Import the dependency for your maven project:
 <dependency>
     <groupId>com.oceanbase</groupId>
     <artifactId>obkv-table-client</artifactId>
-    <version>1.2.1</version>
+    <version>1.2.5</version>
 </dependency>
 ```
 

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

@@ -78,6 +78,7 @@ public void init() throws Exception {
                 return;
             }
             initProperties();
+            init_check();
             connectionFactory = ObConnectionFactory
                 .newBuilder()
                 .configWriteBufferWaterMark(getNettyBufferLowWatermark(),
@@ -113,6 +114,21 @@ public void close() {
         }
     }
 
+    /*
+     * Init check
+     */
+    private void init_check() throws IllegalArgumentException {
+        if (obTableConnectionPoolSize <= 0) {
+            throw new IllegalArgumentException("invalid obTableConnectionPoolSize: "
+                                               + obTableConnectionPoolSize);
+        } else if (ip.isEmpty() || port <= 0) {
+            throw new IllegalArgumentException("invalid ip or port: " + ip + ":" + port);
+        } else if (userName.isEmpty() || database.isEmpty()) {
+            throw new IllegalArgumentException("invalid userName or database: "
+                                               + userName + ":" + database);
+        }
+    }
+
     private void checkStatus() throws IllegalStateException {
         if (!initialized) {
             throw new IllegalStateException(" database [" + database + "] in ip [" + ip