[erlang-bugs] bug in Jinterface sending doubles?

Sebastian Egner <>
Mon Dec 3 17:15:30 CET 2007


Hello!

There seems to be a bug in Jinterface (from R11B-5) related to sending 
doubles from a Java node to an Erlang node:

=ERROR REPORT==== 3-Dec-2007::16:56:35 ===
Got invalid data on distribution channel, offending packet is: 
<<112,131,104,4,97,6,103,100,0,19,115,112,101,99,115,112,108,97,110,64,103,111,108,100,115,116,111,110,101,0,0,0,1,0,0,0,0,1,100,0,0,100,0,2,102,103,131,104,3,100,0,9,36,103,101,110,95,99,97,108,108,104,2,103,100,0,19,115,112,101,99,115,112,108,97,110,64,103,111,108,100,115,116,111,110,101,0,0,0,1,0,0,0,0,1,114,0,3,100,0,19,115,112,101,99,115,112,108,97,110,64,103,111,108,100,115,116,111,110,101,1,0,0,0,13,0,0,0,0,0,0,0,0,104,3,100,0,7,115,101,116,95,118,97,108,100,0,7,117,101,110,101,114,103,121,99,48,69,45,50,48,101,43,48,48,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>>

My guess is that the offending value, the notorious (double)0.0, is not 
properly encoded by OtpOutputStream.write_double():

 > io:format("~s~n", [TheStuffAboveAsAListOfAsciiValues]).
"blabla...uenergyc0E-20e+00...moreblabla"

Sebastian.



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