> Sema Checherinda new test is flaky, here is an example - https://s3.amazonaws.com/clickhouse-test-reports/json.html?PR=80680&sha=b11abdbb68ad684af32e8f54a718dc04e42cb17e&name_0=PR&name_1=Stateless%20tests%20%28tsan%2C%203%2F3%29

I really do not see what could be wrong with that failture.
This error happens when clickhouse communicates with itself. There are no error on server-side, it complains only that pipe is broken. Client-side closes connection due to wrong HTTP header.
So, may be it is ok to add more info in such error:
#80709

Originally posted by @CheSema in #80591 (comment)

Stats
https://play.clickhouse.com/play?user=play#c2VsZWN0IAp0b1N0YXJ0T2ZIb3VyKGNoZWNrX3N0YXJ0X3RpbWUpIGFzIGQsCmNvdW50KCksICBncm91cFVuaXFBcnJheShwdWxsX3JlcXVlc3RfbnVtYmVyKSwgIGFueShyZXBvcnRfdXJsKQpmcm9tIGNoZWNrcyB3aGVyZSAnMjAyNC0wMS0wMScgPD0gY2hlY2tfc3RhcnRfdGltZSBhbmQgdGVzdF9uYW1lIGxpa2UgJyUwMzUxOV9zdG9yYWdlX3VybCUnIGFuZCB0ZXN0X3N0YXR1cyBpbiAoJ0ZBSUwnLCAnRkxBS1knKSBncm91cCBieSBkIG9yZGVyIGJ5IGQgZGVzYw==