diff --git a/docs/en/admin-manual/config/fe-config.md b/docs/en/admin-manual/config/fe-config.md
index b540484e6cda2f..43ec0dd6b6cb65 100644
--- a/docs/en/admin-manual/config/fe-config.md
+++ b/docs/en/admin-manual/config/fe-config.md
@@ -1017,17 +1017,21 @@ IsMutable：true
 
 MasterOnly：true
 
-Consistency checker will run from *consistency_check_start_time* to *consistency_check_end_time*. Default is from 23:00 to 04:00 
+Consistency checker will run from *consistency_check_start_time* to *consistency_check_end_time*.
+
+If the two times are the same, no consistency check will be triggered.
 
 ### consistency_check_end_time
 
-Default：04
+Default：23
 
 IsMutable：true
 
 MasterOnly：true
 
-Consistency checker will run from *consistency_check_start_time* to *consistency_check_end_time*. Default is from 23:00 to 04:00 
+Consistency checker will run from *consistency_check_start_time* to *consistency_check_end_time*.
+
+If the two times are the same, no consistency check will be triggered.
 
 ### export_tablet_num_per_task
 
diff --git a/docs/zh-CN/admin-manual/config/fe-config.md b/docs/zh-CN/admin-manual/config/fe-config.md
index 2cb6360a95c715..c5a3a0200dc703 100644
--- a/docs/zh-CN/admin-manual/config/fe-config.md
+++ b/docs/zh-CN/admin-manual/config/fe-config.md
@@ -1017,11 +1017,13 @@ colocote join PlanFragment instance 的 memory_limit = exec_mem_limit / min (que
 
 一致性检查开始时间
 
-一致性检查器将从 `consistency_check_start_time` 运行到 `consistency_check_end_time`。 默认为 23:00 至 04:00
+一致性检查器将从 `consistency_check_start_time` 运行到 `consistency_check_end_time`。
+
+如果两个时间相同，则不会触发一致性检查。
 
 ### `consistency_check_end_time`
 
-默认值：04
+默认值：23
 
 是否可以动态配置：true
 
@@ -1029,7 +1031,9 @@ colocote join PlanFragment instance 的 memory_limit = exec_mem_limit / min (que
 
 一致性检查结束时间
 
-一致性检查器将从 `consistency_check_start_time` 运行到 `consistency_check_end_time`。 默认为 23:00 至 04:00
+一致性检查器将从 `consistency_check_start_time` 运行到 `consistency_check_end_time`。
+
+如果两个时间相同，则不会触发一致性检查。
 
 ### `export_tablet_num_per_task`
 
diff --git a/fe/fe-core/src/main/java/org/apache/doris/common/Config.java b/fe/fe-core/src/main/java/org/apache/doris/common/Config.java
index 4515c623c25388..a10974f42ac6f7 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/common/Config.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/common/Config.java
@@ -856,12 +856,15 @@ public class Config extends ConfigBase {
     // Configurations for consistency check
     /**
      * Consistency checker will run from *consistency_check_start_time* to *consistency_check_end_time*.
-     * Default is from 23:00 to 04:00
+     * If start time == end time, the checker will stop scheduling.
+     * And default is disabled.
+     * TODO(cmy): Disable by default because current checksum logic has some bugs.
+     * And it will also bring some overhead.
      */
     @ConfField(mutable = true, masterOnly = true)
     public static String consistency_check_start_time = "23";
     @ConfField(mutable = true, masterOnly = true)
-    public static String consistency_check_end_time = "4";
+    public static String consistency_check_end_time = "23";
     /**
      * Default timeout of a single consistency check task. Set long enough to fit your tablet size.
      */
diff --git a/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java b/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java
index 017187e47b4bb4..431b1c25f84703 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java
@@ -98,6 +98,7 @@
 import com.google.common.collect.Maps;
 import com.google.common.collect.Multiset;
 import com.google.common.collect.Sets;
+
 import org.apache.commons.collections.map.HashedMap;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -640,7 +641,8 @@ private void sendFragment() throws TException, RpcException, UserException {
                         switch (code) {
                             case TIMEOUT:
                                 throw new RpcException(pair.first.backend.getHost(), "send fragment timeout. backend id: "
-                                        + pair.first.backend.getId());
+                                        + pair.first.backend.getId() + " fragment: " +
+                                        DebugUtil.printId(pair.first.rpcParams.params.fragment_instance_id));
                             case THRIFT_RPC_ERROR:
                                 SimpleScheduler.addToBlacklist(pair.first.backend.getId(), errMsg);
                                 throw new RpcException(pair.first.backend.getHost(), "rpc failed");