lost connection when I create partitioned table

[chainkite]

Please answer these questions before submitting your issue. Thanks!

1. What did you do?

I tried to load data into tidb with tidb‘s loader, but it always lost connection while loading metadata sql, without any error information.

Finally I found out the reason... it lost connection while creating partitioned table.

Reproduce the issue:

mysql> create table test_partition(id bigint, name varchar(255), primary key(id)) ENGINE=InnoDB DEFAULT CHARSET=utf8 PARTITION BY RANGE  COLUMNS(id) (PARTITION p1 VALUES LESS THAN (10) ENGINE = InnoDB);
ERROR 2013 (HY000): Lost connection to MySQL server during query

2. What did you expect to see?
   Detail error message.

3. What did you see instead?
   Lost connection.

4. What version of TiDB are you using (tidb-server -V or run select tidb_version(); on TiDB)?
   Release Version: v2.0.4-1-g06a0bf5
   Git Commit Hash: 06a0bf5
   Git Branch: release-2.0
   UTC Build Time: 2018-06-19 05:32:47
   GoVersion: go version go1.10.2 linux/amd64
   TiKV Min Version: 2.0.0-rc.4.1 |

[winkyao]

@ciscoxll PTAL

[winkyao]

@ciscoxll I am looking into it.

[tiancaiamao]

It's fixed in #7252
Curiously, this bug should not happen in any released version.
Did you ever upgrade the TiDB from an older version? @chainkite

[winkyao]

@tiancaiamao No, it is another issue

[tiancaiamao]

@chainkite
May I have your TiDB log please? Maybe you could find it at /data/deploy/tidb/tidb-server.log
Does it contains something like:

2018/08/13 11:07:54.740 tidb.go:72: [error] [ddl] init domain failed json: cannot unmarshal object into Go struct field PartitionDefinition.Name of type string
/media/genius/OS/project/src/github.com/pingcap/tidb/meta/meta.go:377: 
/media/genius/OS/project/src/github.com/pingcap/tidb/domain/domain.go:136: 
/media/genius/OS/project/src/github.com/pingcap/tidb/domain/domain.go:110: 
/media/genius/OS/project/src/github.com/pingcap/tidb/domain/domain.go:304: 
/media/genius/OS/project/src/github.com/pingcap/tidb/domain/domain.go:504