multi mgmd bug

[He Ming]

My config.ini
# Options affecting ndbd processes on all data nodes:
[NDBD DEFAULT]
NoOfReplicas=2
DataMemory=150M
IndexMemory=50M

# TCP/IP options:
[TCP DEFAULT]
portnumber=2202

# Management process options:
[NDB_MGMD]
Id=1
hostname=192.168.0.141
datadir=/usr/local/mysql-cluster

[NDB_MGMD]
Id=2
hostname=192.168.0.142
datadir=/usr/local/mysql-cluster


# Options for data node "A":
[NDBD]
Id=3
hostname=192.168.0.141
datadir=/usr/local/mysql/var

# Options for data node "B":
[NDBD]
Id=4
hostname=192.168.0.142
datadir=/usr/local/mysql/var

# SQL node options:
[MYSQLD]
Id=5
hostname=192.168.0.143

cluster normal start show information:

Connected to Management Server at: 192.168.0.141:1186
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=3 @192.168.0.141 (Version: 4.1.19, Nodegroup: 0)
id=4 @192.168.0.142 (Version: 4.1.19, Nodegroup: 0, Master)

[ndb_mgmd(MGM)] 2 node(s)
id=1 @192.168.0.141 (Version: 4.1.19)
id=2 @192.168.0.142 (Version: 4.1.19)

[mysqld(API)] 1 node(s)
id=5 @192.168.0.143 (Version: 4.1.19)

note 192.168.0.142 is NDBD Master

if me press 192.168.0.142's reset button or pull out RJ45, 192.168.0.141's NDBD is crash,no error show,version 5.0 and 5.1 show "error 2305".mysqld is normal,but 192.168.0.141's mgmd can not connect it。

Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=3 (not connected, accepting connect from 192.168.0.141)
id=4 (not connected, accepting connect from 192.168.0.142)

[ndb_mgmd(MGM)] 2 node(s)
id=1 @192.168.0.141 (Version: 4.1.19)
id=2 (not connected, accepting connect from 192.168.0.142)

[mysqld(API)] 1 node(s)
id=5 (not connected, accepting connect from 192.168.0.143)

now...i resume 192.168.0.142 to online、start 192.168.0.141's NDBD later...all ok

Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=3 @192.168.0.141 (Version: 4.1.19, Nodegroup: 0, Master)
id=4 @192.168.0.142 (Version: 4.1.19, Nodegroup: 0)

[ndb_mgmd(MGM)] 2 node(s)
id=1 @192.168.0.141 (Version: 4.1.19)
id=2 @192.168.0.142 (Version: 4.1.19)

[mysqld(API)] 1 node(s)
id=5 @192.168.0.143 (Version: 4.1.19)

now....192.168.0.141 is NDBD Master, i shutdown 192.168.0.142 again,redundance succeed！

Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=3 @192.168.0.141 (Version: 4.1.19, Nodegroup: 0, Master)
id=4 (not connected, accepting connect from 192.168.0.142)

[ndb_mgmd(MGM)] 2 node(s)
id=1 @192.168.0.141 (Version: 4.1.19)
id=2 (not connected, accepting connect from 192.168.0.142)

[mysqld(API)] 1 node(s)
id=5 @192.168.0.143 (Version: 4.1.19)

but i kill Master NDBD's ndbd process later,redundance can succeed,this is soft mode,if use hard mode(power off、press reset、halt network),redundance can not succeed!

this Bug？of limit?