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After tomcat upgrade HTTP XML/REST Value sensors stopped working

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We upgraded service desk server that uses apache tomcat to run. Tomcat version changed from 7.0.55 to 7.0.62 After upgrade 2 PRTG HTTP XML/REST Value sensors that monitor that server stopped working. They show "An unexpected error occurred on a send." instead of sensor value. Pade is returning some values in JSON forms, it did not change during upgrade. Same page that is used for sensors if perfectly forking in both ie and chrome. Other sensors, like HTTP Advanced and HTTP SSL Certificate Expiry are working ok too. Need help.

http json resrt tomcat xml

Created on Aug 27, 2015 1:59:14 PM



7 Replies

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What PRTG version are you running?

Created on Aug 28, 2015 9:07:25 AM by Stephan Linke [Paessler Support]



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PRTG Network Monitor 15.3.18.3616+

Created on Aug 28, 2015 9:09:25 AM



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In sensor log there is just this: ... [Trace] Sending request [Error] The underlying connection was closed: An unexpected error occurred on a send. Exitcode custom_error

Created on Aug 28, 2015 10:37:06 AM



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During experiments I figured out that setting senspors parametr "SSLv3 Connection" from default "Force usage of SSLv3" to "Use SSLv3 if available" enables sensor. Its a possible workaround, but what happens with such settings? PRTG uses TLS?

Created on Aug 28, 2015 11:41:11 AM



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Ah, okay - yep, PRTG uses TLS then; 1.2, then 1.1, then 1.0 :)

Created on Aug 28, 2015 12:05:14 PM by Stephan Linke [Paessler Support]



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I seems that in tomcat after 7.0.57 SSLv3 is disabled by default https://tomcat.apache.org/tomcat-7.0-doc/changelog.html

But still I have a question: I dont have the TLS option like on screenshot https://kb.paessler.com/en/topic/61045-my-http-sensors-could-not-create-an-ssl-secure-channel-and-are-down-what-can-i-do Is TLS really working in my case?

Created on Aug 28, 2015 12:09:44 PM



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The naming is different for various channels, i.e. sometimes not consistent :)

Created on Aug 28, 2015 12:28:04 PM by Stephan Linke [Paessler Support]




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