Frequent occurrence of MPPTask.cpp:709/636 error prompts

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Original topic: 经常出现MPPTask.cpp:709/636的错误提示

| username: Running

[TiDB Usage Environment] Production Environment
[TiDB Version] 7.5
[Reproduction Path] Normal use of version 7.5, two TiDB nodes, three TiKV, three TiFlash
[Encountered Problem: Problem Phenomenon and Impact]
Errors in MPPTask.cpp:709/636 are frequently seen in the logs, but the cluster is functioning normally.

When the 709 error occurs, the corresponding TiDB node does not have error logs at the corresponding time point.

| username: WinterLiu | Original post link

Mark this and wait for the experts to answer.

| username: dba远航 | Original post link

MPP is the mechanism for accessing TiFlash. Check if there are any anomalies in the queries to TiFlash.

| username: 哈喽沃德 | Original post link

Are there complex SQL queries?

| username: xfworld | Original post link

Have you checked the logs of the PD node?

According to the error described in the logs, there is a PD request timeout situation. TiFlash also needs TSO alignment to obtain the corresponding data version number.

| username: 哈喽沃德 | Original post link

MPP is rarely used.

| username: 双开门变频冰箱 | Original post link

Mark, keep an eye on this and wait for the experts to answer.