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Boost FileSystem incorrectly complaining too many files open



2019 Community Moderator Electionhow to perform boost::filesystem copy_file with overwriteopen() in Python does not create a file if it doesn't existTheoretical limit of file descriptors in LinuxLingering open files resulting in “Too many open files”boost::filesystem get relative pathboost version 1.54 boost::filesystem::directory_iterator, Trying to use is_directory function“Connection Refused” errors on RedisBoost Filesystem. is_directory never worksc++ boost Get files from Disk in ParallelCross-platform way to write Unicode to a file










0















I'm iterating over the files in a director (not opening the files, just reading file names) using the below Boost code:



for (auto i = boost::filesystem::directory_iterator(filePath); 
i != boost::filesystem::directory_iterator();
i++)
{


but an exception is throwing on the above line:




what(): boost::filesystem::directory_iterator::construct: Too many
open files: /my_path




However, /proc/sys/fs/file-max and sysctl fs.file-nr show only 72,000 out of 6.5 million file descriptors in use.



I'm confused how Boost can complain given there should be plenty of file handles available?



(This is on Linux)










share|improve this question
























  • You are opening 72,000 files? Without closing them??

    – TonyK
    Mar 7 at 21:21











  • @TonyK The system has 72,000 file descriptors in use. I think I found the answer to the problem anyway, my user has a hard limit of 4,096 file descriptors. See this: tecmint.com/increase-set-open-file-limits-in-linux

    – user997112
    Mar 7 at 21:41















0















I'm iterating over the files in a director (not opening the files, just reading file names) using the below Boost code:



for (auto i = boost::filesystem::directory_iterator(filePath); 
i != boost::filesystem::directory_iterator();
i++)
{


but an exception is throwing on the above line:




what(): boost::filesystem::directory_iterator::construct: Too many
open files: /my_path




However, /proc/sys/fs/file-max and sysctl fs.file-nr show only 72,000 out of 6.5 million file descriptors in use.



I'm confused how Boost can complain given there should be plenty of file handles available?



(This is on Linux)










share|improve this question
























  • You are opening 72,000 files? Without closing them??

    – TonyK
    Mar 7 at 21:21











  • @TonyK The system has 72,000 file descriptors in use. I think I found the answer to the problem anyway, my user has a hard limit of 4,096 file descriptors. See this: tecmint.com/increase-set-open-file-limits-in-linux

    – user997112
    Mar 7 at 21:41













0












0








0








I'm iterating over the files in a director (not opening the files, just reading file names) using the below Boost code:



for (auto i = boost::filesystem::directory_iterator(filePath); 
i != boost::filesystem::directory_iterator();
i++)
{


but an exception is throwing on the above line:




what(): boost::filesystem::directory_iterator::construct: Too many
open files: /my_path




However, /proc/sys/fs/file-max and sysctl fs.file-nr show only 72,000 out of 6.5 million file descriptors in use.



I'm confused how Boost can complain given there should be plenty of file handles available?



(This is on Linux)










share|improve this question
















I'm iterating over the files in a director (not opening the files, just reading file names) using the below Boost code:



for (auto i = boost::filesystem::directory_iterator(filePath); 
i != boost::filesystem::directory_iterator();
i++)
{


but an exception is throwing on the above line:




what(): boost::filesystem::directory_iterator::construct: Too many
open files: /my_path




However, /proc/sys/fs/file-max and sysctl fs.file-nr show only 72,000 out of 6.5 million file descriptors in use.



I'm confused how Boost can complain given there should be plenty of file handles available?



(This is on Linux)







c++ linux boost boost-filesystem






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 7 at 19:09







user997112

















asked Mar 7 at 18:54









user997112user997112

10k28106220




10k28106220












  • You are opening 72,000 files? Without closing them??

    – TonyK
    Mar 7 at 21:21











  • @TonyK The system has 72,000 file descriptors in use. I think I found the answer to the problem anyway, my user has a hard limit of 4,096 file descriptors. See this: tecmint.com/increase-set-open-file-limits-in-linux

    – user997112
    Mar 7 at 21:41

















  • You are opening 72,000 files? Without closing them??

    – TonyK
    Mar 7 at 21:21











  • @TonyK The system has 72,000 file descriptors in use. I think I found the answer to the problem anyway, my user has a hard limit of 4,096 file descriptors. See this: tecmint.com/increase-set-open-file-limits-in-linux

    – user997112
    Mar 7 at 21:41
















You are opening 72,000 files? Without closing them??

– TonyK
Mar 7 at 21:21





You are opening 72,000 files? Without closing them??

– TonyK
Mar 7 at 21:21













@TonyK The system has 72,000 file descriptors in use. I think I found the answer to the problem anyway, my user has a hard limit of 4,096 file descriptors. See this: tecmint.com/increase-set-open-file-limits-in-linux

– user997112
Mar 7 at 21:41





@TonyK The system has 72,000 file descriptors in use. I think I found the answer to the problem anyway, my user has a hard limit of 4,096 file descriptors. See this: tecmint.com/increase-set-open-file-limits-in-linux

– user997112
Mar 7 at 21:41












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