Merge a16fde8070 into e4a9fccddb

```
src/libfastcommon.a(hash.o): relocation R_X86_64_32 against `.data' can not be used when making a shared object; recompile with -fPIC
```

env: Ubuntu 14.04, gcc 4.8

src/Makefile.in

@@ -66,7 +66,7 @@ libfastcommon.a: $(FAST_STATIC_OBJS)
 .c:
 	$(COMPILE) -o $@ $<  $(FAST_STATIC_OBJS) $(LIB_PATH) $(INC_PATH)
 .c.o:
-	$(COMPILE) -c -o $@ $<  $(INC_PATH)
+	$(COMPILE) -c -fPIC -o $@ $<  $(INC_PATH)
 .c.lo:
 	$(COMPILE) -c -fPIC -o $@ $<  $(INC_PATH)
 install:

src/connection_pool.c

@@ -166,7 +166,7 @@ static ConnectionManager *find_manager(ConnectionPool *cp,
     memcpy(cm->key.str, key->str, key->len + 1);
     cm->key.len = key->len;
 
-    //add to chain
+    //add to manager chain
     cm->next = bucket->head;
     bucket->head = cm;
     return cm;
@@ -297,17 +297,21 @@ int conn_pool_init_ex1(ConnectionPool *cp, const int connect_timeout,
         return result;
     }
 
-    if (extra_params != NULL) {
+    if (extra_params != NULL && extra_params->rdma.pd != NULL) {
         extra_connection_size = G_RDMA_CONNECTION_CALLBACKS.
             get_connection_size();
         obj_init_func = (fast_mblock_object_init_func)node_init_for_rdma;
         cp->extra_params = *extra_params;
     } else {
         extra_connection_size = 0;
-        cp->extra_params.tls.enabled = false;
-        cp->extra_params.tls.htable_capacity = 163;
-        cp->extra_params.rdma.buffer_size = 0;
-        cp->extra_params.rdma.pd = NULL;
+        if (extra_params != NULL) {
+            cp->extra_params = *extra_params;
+        } else {
+            cp->extra_params.tls.enabled = false;
+            cp->extra_params.tls.htable_capacity = 163;
+            cp->extra_params.rdma.buffer_size = 0;
+            cp->extra_params.rdma.pd = NULL;
+        }
         obj_init_func = (fast_mblock_object_init_func)node_init_for_socket;
     }
     if ((result=fast_mblock_init_ex1(&cp->node_allocator, "cpool-node",
@@ -730,6 +734,7 @@ ConnectionInfo *conn_pool_get_connection_ex(ConnectionPool *cp,
             return NULL;
         }
 
+        //add to thread local hashtable
         node = (ConnectionNode *)((char *)ci - sizeof(ConnectionNode));
         node->next = *bucket;
         *bucket = node;
@@ -762,6 +767,8 @@ int conn_pool_close_connection_ex(ConnectionPool *cp,
 
     htable = pthread_getspecific(cp->tls_key);
     if (htable == NULL) {
+        logError("file: "__FILE__", line: %d, "
+                "the thread local key NOT exist!", __LINE__);
         return close_connection(cp, conn, &key, hash_code, bForce);
     }
 
@@ -791,6 +798,10 @@ int conn_pool_close_connection_ex(ConnectionPool *cp,
         } else {
             previous->next = node->next;
         }
+    } else {
+        logError("file: "__FILE__", line: %d, "
+                "%.*s NOT in the thread local hashtable!",
+                __LINE__, key.len, key.str);
     }
 
     return close_connection(cp, conn, &key, hash_code, bForce);