# Need Help....Suddenly Servers list count going 0 or missing some servers

**URL:** <https://discuss.hangfire.io/t/need-help-suddenly-servers-list-count-going-0-or-missing-some-servers/7982>\
**Category:** question\
**Tags:** dashboard\
**Created:** [November 24, 2020, 2:12am UTC](https://discuss.hangfire.io/t/need-help-suddenly-servers-list-count-going-0-or-missing-some-servers/7982 "2020-11-24T02:12:18Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![S\_G](https://avatars.discourse-cdn.com/v4/letter/s/9e8a1a/32.png) [@S\_G](https://discuss.hangfire.io/u/S_G)\
**Post date:** [November 24, 2020, 2:12am UTC](https://discuss.hangfire.io/t/need-help-suddenly-servers-list-count-going-0-or-missing-some-servers/7982/1 "2020-11-24T02:12:18Z")

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1. I am currently using 1.6.19 version and what I have noticed is that suddenly Servers list count going 0 or missing some servers. Servers list doesn’t come back untill I refresh IIS on the API servers.

2. I am seeing lot of dead locks and time out preventing hangfire job creation.

3. Also is there a documentation to explain the meaning / impact of the below configurations in the latest version  
CommandBatchMaxTimeout ,  
SlidingInvisibilityTimeout,  
QueuePollInterval ,  
UseRecommendedIsolationLevel ,  
DisableGlobalLocks