SQL Server 2005 Down or Unavailable History -

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i have sql server 2005 instance has nightly run ssis job. in morning see report generated sql job server unavailable.

error:

error code: 0x80004005. ole db record available.
source: "microsoft sql server native client 10.0" hresult: 0x80004005 description: "login timeout expired".
ole db record available. source: "microsoft sql server native client 10.0" hresult: 0x80004005
description: "a network-related or instance-specific error has occurred while establishing connection sql server. server not found or not accessible. check if instance name correct , if sql server configured allow remote connections.

when connect instance in morning, can see working fine now.

is there someway find out 2 things.

  1. when down , again
  2. what's reason of down.

thanks


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