# 64-bit Linux Ruby Problem - Segmentation Fault **URL:** \ **Category:** Ruby\ **Created:** [October 1, 2007, 7:48pm UTC](https://www.ruby-forum.com/t/64-bit-linux-ruby-problem-segmentation-fault/116036 "2007-10-01T19:48:53Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![tinney](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/a88e4f/32.png) [@tinney](https://www.ruby-forum.com/u/tinney)\ **Post date:** [October 1, 2007, 7:48pm UTC](https://www.ruby-forum.com/t/64-bit-linux-ruby-problem-segmentation-fault/116036/1 "2007-10-01T19:48:53Z")
I’ve been running a basic ruby/rails CRUD application on a 32-bit Red Hat Linux machine. It works well on several 32-bit test/dev boxes. When I move it over to a 64-bit box it runs for a few minutes, then I start getting the following error: $ ruby script/server lighttpd =\> Booting lighttpd (use ‘script/server webrick’ to force WEBrick) =\> Rails application starting on [http://0.0.0.0:3000](http://0.0.0.0:3000) =\> Call with -d to detach =\> Ctrl-C to shutdown server (see config/lighttpd.conf for options) /usr/local/lib/ruby/1.8/pstore.rb:354: [BUG] Segmentation fault ruby 1.8.6 (2007-03-13) [x86\_64-linux] I’ve tried using all three web servers, but they all produce the same error. I’ve been using Red Hat Enterprise Linux AS release 4 (Nahant Update 2) with the following packages installed: ruby-1.8.6 rubygems-0.9.4 ruby-oci8-1.0.0-rc3 fcgi-2.4.0 pcre-5 rails In addition I have the following web servers installed: lighttpd-1.4.16 webrick mongrel Thanks, Dustin ---
**Author:** ![tinney](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/a88e4f/32.png) [@tinney](https://www.ruby-forum.com/u/tinney)\ **Post date:** [October 1, 2007, 9:38pm UTC](https://www.ruby-forum.com/t/64-bit-linux-ruby-problem-segmentation-fault/116036/2 "2007-10-01T21:38:34Z")
On 10/1/07, Dustin T. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I’ve been running a basic ruby/rails CRUD application on a 32-bit Red > Hat Linux machine. It works well on several 32-bit test/dev boxes. > When I move it over to a 64-bit box it runs for a few minutes, then I > start getting the following error: What happens when you switch to database sessions? (You are using file based sessions, correct?) ---
**Author:** ![tinney](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/a88e4f/32.png) [@tinney](https://www.ruby-forum.com/u/tinney)\ **Post date:** [October 2, 2007, 5:38am UTC](https://www.ruby-forum.com/t/64-bit-linux-ruby-problem-segmentation-fault/116036/3 "2007-10-02T05:38:54Z")
Dustin T. wrote: > /usr/local/lib/ruby/1.8/pstore.rb:354: [BUG] Segmentation fault > ruby 1.8.6 (2007-03-13) [x86\_64-linux] Hmmmm … /usr/local/lib/ruby/1.8/pstore.rb?? Where is your Ruby _interpreter_ stored? Did you install it from a 64-bit-compatible RHEL 4 RPM or some other way? > fcgi-2.4.0 > pcre-5 > rails > > In addition I have the following web servers installed: > lighttpd-1.4.16 > webrick > mongrel > > Thanks, > Dustin I think the problem is the Ruby interpreter, not any of the packages. The segfault appears to have happened when the interpreter was on line 354 of “pstore.rb” as noted above. Make sure all your packages are pure 64-bit and installed from reputable RPMs, or rebuild them from source RPMs with “rpmbuild”. ---
**Author:** ![tinney](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/a88e4f/32.png) [@tinney](https://www.ruby-forum.com/u/tinney)\ **Post date:** [October 4, 2007, 8:44pm UTC](https://www.ruby-forum.com/t/64-bit-linux-ruby-problem-segmentation-fault/116036/4 "2007-10-04T20:44:25Z")
Wayne E. Seguin wrote: > On 10/1/07, Dustin T. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > I’ve been running a basic ruby/rails CRUD application on a 32-bit Red > > Hat Linux machine. It works well on several 32-bit test/dev boxes. > > When I move it over to a 64-bit box it runs for a few minutes, then I > > start getting the following error: > > What happens when you switch to database sessions? (You are using file > based > sessions, correct?) It seems as though there is some sort of 64-bit memory leak when using the file store mechanism, specifically the PStore.rb file. I installed/configured the program to use MemCache and it appears to be working, effectively avoiding the file causing the segmentation fault. Thanks everyone for your help.