I am using an NFSv4 server and client in a LAN and a shared directory from that NFS server is mounted in my home.
I am observing many hangups when moving files from my home to that mounted folder if I use dolphin for that task. The "hangups" are unresponsive dolphin windows, while no data is being copied in that moment (watching the network traffic and disk utilization on the NFS server). If I open another dolphin window and change to the same directory that is stuck in the other dolphin window, the new dolphin window is getting stuck too.
The only way to resolve this problem is to kill all kio_file tasks, which immediately makes the open dolphin windows usable again (and terminates the copying process of course).
I don't know how to reproduce this exactly, I only know that It happens when I am copying many (about 20) folders/files to the NFS directory or delete multiple selected folders from the NFS directory. I was able to circumvent the deletion problem by deleting only one selected folder at a time. The time I selected two instead of one folder, kio_file got stuck again, I killed it and deleted the remaining folder (it seemed to have deleted at least one of the selected folders before it got stuck).
I think this problem does not occur all the time but the more kio_file using apps are open and copying stuff to that folder the higher the probability for getting stuck again.
Most of the data I copy/delete is several gigabytes large; this night I copied about 200 gigs (or at least tried until I fell back to cp)
I'm sorry for this unspecific prosa, but I don't know a better way to reproduce or describe the problem.
Steps to Reproduce:
As described above, this might be difficult. At least one needs a mounted NFS share and some folders with larger files to copy into that folder.
as described above, kio_file gets stuck and has to be killed and I have to retry again
it should work like 'select, copy and forget' :-)
I am using kde 4.5.3, but it was not an available choice in bugzilla, only up to 4.5.2 or snapshot.
As the software hangs and needs to be killed, I am going to classify this as a crash.
in ktorrent which uses kio_file too as far as I know I suddenly have the error: cannot open file bla: Too many open files.
May it be, that I try to move "too many" files at once and that the ioslave cannot handle this? Just a guess...
*** Bug 236463 has been marked as a duplicate of this bug. ***
*** Bug 228787 has been marked as a duplicate of this bug. ***
*** Bug 158606 has been marked as a duplicate of this bug. ***
*** Bug 281954 has been marked as a duplicate of this bug. ***
my use-case is that a client actually in turn boots my server (sounds silly but it's an access thing), and if on occasion (like this morning) this server fails to start, the kde session on the client stalls indefinately until the server comes up.
why? because the restore session is loading several instances of dolphin that i was using previously, and ony or more of those has a tab 'open' on a nfs share dir.
*** This bug has been marked as a duplicate of bug 317676 ***
seems like kde 4.13 is still affected by this bug!