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Created attachment 24103 [details]
ZIP containing text file of console output
We are using Novell.Ldap library to connect to ActiveDirectory using SSL, running on CentOS-7. With mono version 188.8.131.52, there were no issues, with mono version 184.108.40.2064 we are seeing consistent hang at a customer site, while reading large amount of data from AD server. Running the same binaries on both mono versions, 3.8 works where as 4.8 hangs.
Unfortunately, we can not reproduce the hang in house, this is happening at customer sites only.
In house reading schema is trying to read 200K bytes and it gets chunked at 16k, at customer site trying to read 400K bytes and it gets chunked at 7K. ChiperSuite was Rijandael 256 in both cases.
Attached ZIP file contains the console output from mono --trace:Mono.Security
see line: <<< NOTE: Hang occurs here in log file where the hang occurs.
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This turned out to be mono sgen GC problem. Running a simple sample program with MONO_GC_PARAMS=nursery-size=16m fixes the issue at the customer site.
Setting to NEW