TiDB panicked when loading data

[winoros]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. What did you do?
   If possible, provide a recipe for reproducing the error.

I'm loading TPC-H's dataset using LOAD DATA LOCAL INFILE.

2. What did you expect to see?

All data is loaded successfully.

3. What did you see instead?

Some connection panicked.
The following is the error stack:

[2019/06/18 20:40:32.421 +08:00] [ERROR] [conn.go:460] ["connection running loop panic"] [conn=2805] [lastCmd="load data local infile './data/tpch50/lineitem.tbl.75' into table lineitem fields terminated by '|' lines terminated by '|\
'"] [err="\"invalid memory address or nil pointer dereference\""] [stack="goroutine 5524412 [running]:
github.com/pingcap/tidb/server.(*clientConn).Run.func1(0x1e47f80, 0xc020530750, 0xc01e2aa480, 0xc013cbda1f)
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/conn.go:458 +0x114
panic(0x1a269a0, 0x2bd7640)
\t/usr/local/go/src/runtime/panic.go:522 +0x1b5
github.com/pingcap/tidb/session.(*TxnState).SetOption(0xc02552a1d0, 0xa, 0x19a5b80, 0x2c38c41)
\t<autogenerated>:1 +0x2e
github.com/pingcap/tidb/server.(*clientConn).handleLoadData(0xc01e2aa480, 0x1e47ec0, 0xc01f0da380, 0xc00befe150, 0x1df7db0, 0x0)
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/conn.go:872 +0x5af
github.com/pingcap/tidb/server.(*clientConn).handleQuery(0xc01e2aa480, 0x1e47ec0, 0xc01f0da380, 0xc014ad0881, 0x7d, 0x0, 0x0)
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/conn.go:936 +0x6dd
github.com/pingcap/tidb/server.(*clientConn).dispatch(0xc01e2aa480, 0x1e47f80, 0xc020530750, 0xc014ad0881, 0x7e, 0x7e, 0x0, 0x0)
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/conn.go:658 +0x4f4
github.com/pingcap/tidb/server.(*clientConn).Run(0xc01e2aa480, 0x1e47f80, 0xc020530750)
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/conn.go:506 +0x1f6
github.com/pingcap/tidb/server.(*Server).onConn(0xc000c69ec0, 0xc01e2aa480)
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/server.go:384 +0x450
created by github.com/pingcap/tidb/server.(*Server).Run
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/server.go:311 +0x83d
"] [stack="github.com/pingcap/tidb/server.(*clientConn).Run.func1
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/conn.go:460
runtime.gopanic
\t/usr/local/go/src/runtime/panic.go:522
runtime.panicmem
\t/usr/local/go/src/runtime/panic.go:82
runtime.sigpanic
\t/usr/local/go/src/runtime/signal_unix.go:390
github.com/pingcap/tidb/session.(*TxnState).SetOption
\t<autogenerated>:1
github.com/pingcap/tidb/server.(*clientConn).handleLoadData
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/conn.go:872
github.com/pingcap/tidb/server.(*clientConn).handleQuery
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/conn.go:936
github.com/pingcap/tidb/server.(*clientConn).dispatch
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/conn.go:658
github.com/pingcap/tidb/server.(*clientConn).Run
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/conn.go:506
github.com/pingcap/tidb/server.(*Server).onConn
\t/home/jenkins/workspace/release_tidb_2.1-ga/go/src/github.com/pingcap/tidb/server/server.go:384"]

4. What version of TiDB are you using (tidb-server -V or run select tidb_version(); on TiDB)?

release 2.11

[winoros]

@winkyao @jackysp PTAL

[jackysp]

I think #9444 may fix it.

[ghost]

I am going to close this issue, as it appears to have been fixed. Please feel free to re-open it if you have any additional questions. Thanks!