From 363fde376cb3bc98c87db932697afacc017acd81 Mon Sep 17 00:00:00 2001
From: wenyh1 <2365151147@qq.com>
Date: Tue, 31 Oct 2023 18:03:06 +0800
Subject: [PATCH] [inner-2371] fix: sql execution hang problem caused by the
 inability to respond to the front side due to unprocessed packets.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

(cherry picked from commit dcff228b4c13bf0fd9f7bb0d52f9c18aaba36b59、07c0c1f1c986a71fb74d0fcc0379965592c63b49)
---
 .../java/com/actiontech/dble/services/BackendService.java | 8 ++++----
 .../dble/services/mysqlsharding/MySQLResponseService.java | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/main/java/com/actiontech/dble/services/BackendService.java b/src/main/java/com/actiontech/dble/services/BackendService.java
index 64559481fd..79c80ac850 100644
--- a/src/main/java/com/actiontech/dble/services/BackendService.java
+++ b/src/main/java/com/actiontech/dble/services/BackendService.java
@@ -102,8 +102,8 @@ protected void doHandle(ServiceTask task) {
                     handleDataError(e);
                 } finally {
                     isHandling.set(false);
-                    if (taskQueue.size() > 0) {
-                        doHandle(null);
+                    if (!taskQueue.isEmpty()) {
+                        doHandle(taskQueue.peek());
                     }
                 }
             });
@@ -125,7 +125,7 @@ public void execute(ServiceTask task) {
             handleDataError(e);
         } finally {
             isHandling.set(false);
-            if (taskQueue.size() > 0) {
+            if (!taskQueue.isEmpty()) {
                 doHandle(task);
             }
         }
@@ -215,7 +215,7 @@ protected void handleInnerData(byte[] data) {
     protected void handleDataError(Exception e) {
         LOGGER.warn(this.toString() + " handle data error:", e);
         connection.close("handle data error:" + e.getMessage());
-        while (taskQueue.size() > 0) {
+        while (!taskQueue.isEmpty()) {
             clearTaskQueue();
             // clear all data from the client
             LockSupport.parkNanos(TimeUnit.MILLISECONDS.toNanos(1000));
diff --git a/src/main/java/com/actiontech/dble/services/mysqlsharding/MySQLResponseService.java b/src/main/java/com/actiontech/dble/services/mysqlsharding/MySQLResponseService.java
index 5d7e460fe6..1f7a4f700f 100644
--- a/src/main/java/com/actiontech/dble/services/mysqlsharding/MySQLResponseService.java
+++ b/src/main/java/com/actiontech/dble/services/mysqlsharding/MySQLResponseService.java
@@ -491,7 +491,7 @@ protected boolean beforeHandlingTask() {
     @Override
     protected Executor getExecutor() {
         Executor executor;
-        if (complexQuery) {
+        if (complexQuery || SystemConfig.getInstance().getUsePerformanceMode() == 1) {
             executor = DbleServer.getInstance().getComplexQueryExecutor();
         } else {
             executor = DbleServer.getInstance().getBackendBusinessExecutor();