The messages “Folder org already exists in …” and “Too many open files” when using Netbeans are likely related. The underlying error might be that Linux runs out of file descriptors, which can happen rather quickly when you open many projects at once. Here’s the solution.
The file descriptors can be set at the system level and at the shell level:
Check how many your system allows:
This value can be set to a high number, probably to several 100k without major issues. For now you might try:
echo “65536″ >/proc/sys/fs/file-max
You could also add
fs.file-max = 65536
to reload sysctl.conf
For the shell type
to get the number of file descriptors.
You can set for example
* soft nofile 8192
* hard nofile 8192
to increase the number.
After increasing these values I have not had any issues with Netbeans as described above for several months now. Hope it helps.
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