Trying to test NativeTransport and getting DllNotFoundException about hyperfastcgi

[antonheryanto]

might need to add dll map to etc/mono/config

my setup prefix is /opt/mono so i edit /opt/mono/etc/mono/config an add this

<configuration>
...
  <dllmap dll="libhfc-native" target="/opt/mono/lib64/libhfc-native.so" os="!windows"/>
  <dllmap dll="libhfc-native" target="/opt/mono/lib64/libhfc-native.so" os="!windows"/>
</configuration>

[xplicit]

Where is mono installed? You can check it with ldconfig -p |grep libmono command. If mono is installed in other directory than /usr, for example /usr/local then you should pass it as prefix when compile hyperfastcgi ./autogen.sh --prefix=/usr/local

[jpasichnyk]

root@p-dev:/tmp# ldconfig -p |grep libmono
        libmonosgen-2.0.so.1 (libc6,x86-64) => /usr/lib/libmonosgen-2.0.so.1
        libmonosgen-2.0.so (libc6,x86-64) => /usr/lib/libmonosgen-2.0.so
        libmonoboehm-2.0.so.1 (libc6,x86-64) => /usr/lib/libmonoboehm-2.0.so.1
        libmono-profiler-log.so.0 (libc6,x86-64) => /usr/lib/libmono-profiler-log.so.0
        libmono-profiler-log.so (libc6,x86-64) => /usr/lib/libmono-profiler-log.so
        libmono-profiler-iomap.so.0 (libc6,x86-64) => /usr/lib/libmono-profiler-iomap.so.0
        libmono-profiler-iomap.so (libc6,x86-64) => /usr/lib/libmono-profiler-iomap.so
        libmono-profiler-aot.so.0 (libc6,x86-64) => /usr/lib/libmono-profiler-aot.so.0
        libmono-profiler-aot.so (libc6,x86-64) => /usr/lib/libmono-profiler-aot.so

It seems like since both are in /usr/lib, it should "just work" right?

[jpasichnyk]

I also tried adding the following to my /etc/mono/config, with no change in behavior:

<dllmap dll="libhfc-native" target="/usr/lib/libhfc-native.so" os="!windows"/>
<dllmap dll="libhfc-native.dll" target="/usr/lib/libhfc-native.so" os="!windows"/>

[xplicit]

Can you show output of ldd -r /usr/lib/libhfc-native.so ?

[jpasichnyk]

/usr/lib/libhfc-native.so: /usr/lib/libmonoboehm-2.0.so.1: no version information available (required by /usr/lib/libhfc-native.so)
        linux-vdso.so.1 =>  (0x00007ffd477f6000)
        libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f8812efd000)
        libevent_pthreads-2.0.so.5 => not found
        libevent-2.0.so.5 => not found
        libmonoboehm-2.0.so.1 => /usr/lib/libmonoboehm-2.0.so.1 (0x00007f8812942000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f8812724000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f881235e000)
        libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f8812120000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f8811e1a000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f8811c11000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f8811a0d000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f88117f7000)
        /lib64/ld-linux-x86-64.so.2 (0x0000560cf9136000)
undefined symbol: bufferevent_read      (/usr/lib/libhfc-native.so)
undefined symbol: bufferevent_set_timeouts      (/usr/lib/libhfc-native.so)
undefined symbol: event_base_new        (/usr/lib/libhfc-native.so)
undefined symbol: event_base_set        (/usr/lib/libhfc-native.so)
undefined symbol: bufferevent_socket_new        (/usr/lib/libhfc-native.so)
undefined symbol: bufferevent_write_buffer      (/usr/lib/libhfc-native.so)
undefined symbol: event_base_loopexit   (/usr/lib/libhfc-native.so)
undefined symbol: event_del     (/usr/lib/libhfc-native.so)
undefined symbol: evthread_use_pthreads (/usr/lib/libhfc-native.so)
undefined symbol: evbuffer_free (/usr/lib/libhfc-native.so)
undefined symbol: bufferevent_get_output        (/usr/lib/libhfc-native.so)
undefined symbol: bufferevent_base_set  (/usr/lib/libhfc-native.so)
undefined symbol: event_add     (/usr/lib/libhfc-native.so)
undefined symbol: evbuffer_unlock       (/usr/lib/libhfc-native.so)
undefined symbol: event_base_free       (/usr/lib/libhfc-native.so)
undefined symbol: evbuffer_add  (/usr/lib/libhfc-native.so)
undefined symbol: event_base_get_method (/usr/lib/libhfc-native.so)
undefined symbol: evbuffer_get_length   (/usr/lib/libhfc-native.so)
undefined symbol: event_set     (/usr/lib/libhfc-native.so)
undefined symbol: bufferevent_free      (/usr/lib/libhfc-native.so)
undefined symbol: evbuffer_new  (/usr/lib/libhfc-native.so)
undefined symbol: event_base_dispatch   (/usr/lib/libhfc-native.so)
undefined symbol: bufferevent_enable    (/usr/lib/libhfc-native.so)
undefined symbol: bufferevent_setcb     (/usr/lib/libhfc-native.so)
undefined symbol: event_get_version     (/usr/lib/libhfc-native.so)
undefined symbol: evbuffer_enable_locking       (/usr/lib/libhfc-native.so)
undefined symbol: evbuffer_lock (/usr/lib/libhfc-native.so)

[xplicit]

You need to install libevent2 (it's libevent-dev package on Ubuntu system) and then recompile

[xplicit]

I wonder why is mono linked to libmonoboehm-2.0.so.1? It should be linked to libmonosgen What operating system/mono version do you use? It's not related to the issue, just interesting.

[jpasichnyk]

Ok, i'll install libevent2 and rebuild.

would that GC linking matter on the box it was built on, or running on? Box it is running on is as follows:

root@p-dev:/usr/lib# mono -V
Mono JIT compiler version 4.6.1 (Stable 4.6.1.5/ef43c15 Wed Oct 12 09:10:37 UTC 2016)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
        TLS:           __thread
        SIGSEGV:       altstack
        Notifications: epoll
        Architecture:  amd64
        Disabled:      none
        Misc:          softdebug
        LLVM:          supported, not enabled.
        GC:            sgen

[jpasichnyk]

Actually, it looks like just installing libevent-dev package on the web server allows it to run with the Native listener!

Now i just need to do some performance/stability testing to see how this new version works. :)

[xplicit]

Library is linked on the machine where you build. Boehm garbage collector is deprecated and should be avoided to use due to heap fragmentation issues. You can check on your web server which garbage collector library your mono installation uses via ls -al /usr/lib/libmono-2* command. Files should point to libmonosgen-2.0.so*.
I highly recommend to rebuild HyperFastCgi directly on your web server or on the server with the same configuration of mono and other dependend libraries installation.

[jpasichnyk]

i# ls -al /usr/lib/libmono-2*
lrwxrwxrwx 1 root root 17 Oct 12 02:21 /usr/lib/libmono-2.0.a -> libmonosgen-2.0.a
lrwxrwxrwx 1 root root 18 Oct 12 02:21 /usr/lib/libmono-2.0.so -> libmonosgen-2.0.so
lrwxrwxrwx 1 root root 20 Oct 12 02:21 /usr/lib/libmono-2.0.so.1 -> libmonosgen-2.0.so.1
lrwxrwxrwx 1 root root 24 Oct 12 02:21 /usr/lib/libmono-2.0.so.1.0.0 -> libmonosgen-2.0.so.1.0.0

Ok, yeah i'll rebuild after upgrading mono on our build box and give it another try.