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bjett_224741's avatar
bjett_224741
Icon for Altostratus rankAltostratus
Jan 20, 2017
Solved

Ltm Pool Monitor Down Clarification "Tcp read:" vs "Unable to Connect;"

Had simple http monitor fail on multiple servers the error on one server was different from the other 5: The difference is minor the one server says:   "Tcp read: Connection refused; Unable to con...
application delivery
BIG-IP
LTM
  • IheartF5_45022's avatar
    IheartF5_45022
    Jan 20, 2017

    I would assume a RST is received from member after handshake completed, and after request sent to member.

     

IheartF5_45022's avatar
IheartF5_45022
Icon for Nacreous rankNacreous
Jan 20, 2017

I would assume a RST is received from member after handshake completed, and after request sent to member.

 

  • bjett_224741's avatar
    bjett_224741
    Icon for Altostratus rankAltostratus
    Jan 23, 2017

    That is kind of what I thought. The issue we were having that day was high load and Max Workers on apache. All the servers that had this except one had the: "Unable to connect; No successful responses received before deadline." which is the most common one. The monitor down messages from the one server were all "Tcp read: Connection refused; Unable to connect; No successful responses received before deadline." and I assumed it was a monitor timeout failure after the handshake.