also looks like calling configure with the --disable-openmp prevents the seg fault which allows me to continue to use tesseract for now would still like to figure out why the seg fault is occuring with multiple threads.
On Thursday, April 12, 2018 at 8:23:06 PM UTC-5, Kalven Schraut wrote: > > Looks like the issue is from > #pragma omp parallel for num_threads(kNumThreads) at > > https://github.com/tesseract-ocr/tesseract/blob/master/lstm/fullyconnected.cpp#L140 > > anyone more familiar with openMP know a possible reason for a seg fault > there? > > On Tuesday, April 10, 2018 at 7:29:31 AM UTC-5, Kalven Schraut wrote: >> >> I am attempting to use tesseract's API in my project and everything works >> as expected on ubuntu when running the code, but I am receiving a seg fault >> when I moved everything over to an alpine docker container. >> >> The backtrace from the segfault: >> #0 0x00007ffff2c4a50a in ?? () from /usr/lib/libgomp.so.1 >> #1 0x00007ffff2c45d02 in GOMP_parallel () from /usr/lib/libgomp.so.1 >> #2 0x00007ffff492cfea in tesseract::FullyConnected::Forward >> (this=0x5555577dbb20, debug=<optimized out>, input=..., >> input_transpose=<optimized out>, >> scratch=0x5555577f9fc8, output=0x55555877b6a0) at >> fullyconnected.cpp:140 >> #3 0x00007ffff49598ff in tesseract::Series::Forward >> (this=0x555557803f60, debug=<optimized out>, input=..., >> input_transpose=<optimized out>, >> scratch=0x5555577f9fc8, output=0x55555877b6a0) at series.cpp:123 >> #4 0x00007ffff49598ff in tesseract::Series::Forward >> (this=0x555557803d60, debug=<optimized out>, input=..., >> input_transpose=<optimized out>, >> scratch=0x5555577f9fc8, output=0x7fffffffc380) at series.cpp:123 >> #5 0x00007ffff493b8ce in tesseract::LSTMRecognizer::RecognizeLine >> (this=this@entry=0x5555577f9c80, image_data=..., invert=invert@entry=true, >> debug=debug@entry=false, re_invert=re_invert@entry=false, >> upside_down=upside_down@entry=false, scale_factor=0x7fffffffc35c, >> inputs=0x7fffffffc410, >> outputs=0x7fffffffc380) at lstmrecognizer.cpp:256 >> #6 0x00007ffff493c4d0 in tesseract::LSTMRecognizer::RecognizeLine >> (this=0x5555577f9c80, image_data=..., invert=invert@entry=true, debug=false, >> worst_dict_cert=worst_dict_cert@entry=-3.5714285373687744, >> line_box=..., words=words@entry=0x7fffffffc600) at lstmrecognizer.cpp:190 >> #7 0x00007ffff480978f in tesseract::Tesseract::LSTMRecognizeWord >> (this=this@entry=0x555557782420, block=..., row=row@entry=0x55555861c2e0, >> word=<optimized out>, >> words=words@entry=0x7fffffffc600) at linerec.cpp:241 >> #8 0x00007ffff47ef729 in tesseract::Tesseract::classify_word_pass1 >> (this=0x555557782420, word_data=..., in_word=0x5555585bd4e0, >> out_words=0x7fffffffc600) >> at control.cpp:1373 >> #9 0x00007ffff47f09a5 in tesseract::Tesseract::RetryWithLanguage >> (this=0x555557782420, word_data=..., recognizer=<optimized out>, >> debug=debug@entry=false, >> in_word=0x5555585bd4e0, best_words=0x7fffffffc6e0) at control.cpp:898 >> #10 0x00007ffff47f113b in >> tesseract::Tesseract::classify_word_and_language >> (this=this@entry=0x555557782420, pass_n=pass_n@entry=1, >> pr_it=pr_it@entry=0x7fffffffc850, >> word_data=word_data@entry=0x55555863ac08) at control.cpp:1314 >> #11 0x00007ffff47f463c in tesseract::Tesseract::RecogAllWordsPassN >> (this=this@entry=0x555557782420, pass_n=pass_n@entry=1, >> monitor=monitor@entry=0x0, >> pr_it=pr_it@entry=0x7fffffffc850, words=words@entry=0x7fffffffc830) >> at control.cpp:265 >> #12 0x00007ffff47f612d in tesseract::Tesseract::recog_all_words >> (this=0x555557782420, page_res=0x5555585d6160, monitor=monitor@entry=0x0, >> target_word_box=target_word_box@entry=0x0, >> word_config=word_config@entry=0x0, dopasses=dopasses@entry=0) at >> control.cpp:352 >> >> I first tried installing the tesseract-git package in alpine where I >> noticed the issue so I just finished compiling the master branch of >> tesseract-ocr and I am still receiving the seg fault. >> >> Also my compiled version of tesseract runs fine through the CLI. >> >> I am lost as to what else could be the problem and would appreciate any >> help/direction on how to solve this issue. >> > -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/d9c49679-5eed-4fa2-824f-64b40fa991d5%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
