NE datacollector in U2000 V1R1 does not working

Issue Description

we are U2000 Version : U2000V1R1C00CP311 to manage Huawei OSN3500 and OSN7500 , and we found that the NE Datacollector Does not working
The problem phenomenon as follow ( we have 2 problems ) :
1.  After select the NE Datacollector from the OSN function tree , we could not login the the OSN NE in the NE data collector as showed in the b/m print screen

2.  After select the NE datacollector from OSN Function tree, we couldn't find Huawei OSN NE in the Datacollector ( OSN NE not exist to select Login ) .

Alarm Information

Null

Handling Process

1.  check if this problem in one NE or all NEs over the U2000 .
2.  check the U2000 System monitor process (espcially : neproxy process ) .
3.  get these logs and sent it to GTAC :

    *  D:/U2000/server/tools/datacollector/dbfile/Datacollector.db
    *  D:/U2000/Client/Tools/neinfo.xml

4.  check the Set Login account and check the Operated and fixed Users .
5.  Check the Upper limit of creation from the datacollector logs if it reach to be 50 (the max ) let us use the temp solution till upgrade the U2000 version to be U2000 V1R2C01SPC100

Root Cause

For Problem # 1

This problem is due to when your user login, other user resave it, then make this user logout.
Pls check NE--->set login Account, and check whether there has the same user set in this table, if yes, pls change fixed user to other login user.  See following picture:

IF the problem still exist we need to restart the Process of neproxy process from U2000 System monitor
For Porblem # 2  : According to the Logs of the Datacollector we find that : 

we find that : the creation NEs of Datacollector is  already reach the upper limit 50
so we need to upgrade current U2000 version to be U2000 V1R2C01SPC100 or use Temp solution as follow :

we can use the new (Datacollector.db) which supprot more 50 NE and replace the new (Datacollector.db) file in path

Suggestions

1.  check all the U2000 system monitor .
2.  check the Set Login account in the Datacollector .
3.  Use the Temp solution (use the new (Datacollector.db)) if you cannot upgrade the U2000 to be: U2000 V1R2C01SPC100
4.  U2000 V1R2C01SPC100 of Higher version solves this problem.