When upgrading a Sitecore instance (from version 8.1 to 8.2), the update installation wizard would freeze at a certain point. This was happening with both the analyze and install option, it would always freeze around item number 535 - 540.
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Sitecore update installation freezes |
The event logs would display no useful information and there was nothing in the Sitecore logs. After attaching
procdump to the w3wp process, it was discovered that a stack overflow exception was being raised. The
debug diagnostic tool was then enabled (and set to log a full dump for stack overflow exceptions). The dump file showed that New Relic logging was causing a stack overflow each time and causing the update to freeze.
In my case disabling New Relic, allowed the update to work as expected.
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