I get this error inconsistently when I have multiple threads entering
the same code that wraps a transaction around my services at about the
same time:

NameError: unitialized constant Digest::SHA256
          const_missing at org/jruby/RubyDigest.java:140
             initialize at /opt/torquebox/vendor/jruby/1.8/gems/
data_objects-0.10.6/lib/data_objects/transaction.rb:30
         create_for_uri at /opt/torquebox/vendor/jruby/1.8/gems/
data_objects-0.10.6/lib/data_objects/transaction.rb:21
  transaction_primitive at /opt/torquebox/vendor/jruby/1.8/gems/dm-
transactions-1.1.0/lib/dm-transactions/adapters/dm-do-adapter.rb:20
        connect_adapter at /opt/torquebox/vendor/jruby/1.8/gems/dm-
transactions-1.1.0/lib/dm-transactions.rb:303
                   send at org/jruby/RubyKernel.java:2063
           each_adapter at /opt/torquebox/vendor/jruby/1.8/gems/dm-
transactions-1.1.0/lib/dm-transactions.rb:250
               each_key at org/jruby/RubyHash.java:1235
           each_adapter at /opt/torquebox/jruby/1.8/gems/dm-
transactions-1.1.0/lib/dm-transactions.rb:249
                  begin at /opt/torquebox/jruby/1.8/gems/dm-
transactions-1.1.0/lib/dm-transactions.rb:108
                 commit at /opt/torquebox/jruby/1.8/gems/dm-
transactions-1.1.0/lib/dm-transactions.rb:130

When it happens, it only happens to one thread (out of 4 usually).
I've also seen an error "Mutex is locked" or something like that.  But
again, I can't reproduce it consistently.

Any one have some ideas?

I know this may not be datamapper related - sorry if its not.

Thanks,

Joe

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