Also encountering this issue with "tail -f <log>", for a log file produced by a script with a LOT of rapid output.
Similar issues happen with a simple bash builtin like "read -s -t 1 -N 1 <var>": it periodically gets in a state where it immediately reports "read: 0: read failed: Resource temporarily unavailable". I initially noticed this with a log watcher script that periodically (every 1s) gathers the tail-end of a log file (same one I'm monitoring with "tail -f" above), then checks for single-character user commands between log polling cycles. I verified that stdin was NOT left in a non-blocking state and managed to reproduce it without even watching the log file or doing anything else (just a tight loop with the above "read" command). This happens a lot more frequently than "tail -f" getting interrupted above, and the event tends to repeat in bursts. This has so far happened under MATE Terminal and konsole, with or without byobu. It does not happen with other distros I've tried. Nothing amiss appears in the system/kernel logs around this time either. Load average on this system commonly reaches 10-16 with almost no swap usage (it's an 8-core+8-thread machine doing various CI builds). I have yet to try it on a text-only TTY, but I suppose I could try that next. System info: Ubuntu 18.04.2 Linux motsognir 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/151440 Title: standard output: Resource temporarily unavailable Status in linux package in Ubuntu: Incomplete Bug description: I am running Gutsy, upgraded on the 9 October 2007. The current kernel is: Linux version 2.6.22-14-generic (buildd@palmer) (gcc version 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)) #1 SMP Tue Oct 9 09:51:52 GMT 2007 I have an amd x2, but I am running the 32 bit OS (or so I think). Currently I have KSysguard, Firefox, emacs and Rhythmbox running. I am developing using tcl scripting. I run my tcl script from an xterm, with output teed to a log file in the form: ./tcl_script | tee log_file The script produces a lot of output, quite fast. Around 50% of the times the script stops and I get the message: "tee: write error" Sometimes I see also: "tee: standard output: Resource temporarily unavailable" I get the following message The error seems to disappear if I redirect the output of tee to a file in the way: ./tcl_script | tee log_file > file This same script is working fine in other machines (Solaris). I do not attach the script since it is actually a very big test suite. more information lspci 00:00.0 RAM memory: nVidia Corporation MCP61 Memory Controller (rev a1) 00:01.0 ISA bridge: nVidia Corporation MCP61 LPC Bridge (rev a2) 00:01.1 SMBus: nVidia Corporation MCP61 SMBus (rev a2) 00:01.2 RAM memory: nVidia Corporation MCP61 Memory Controller (rev a2) 00:02.0 USB Controller: nVidia Corporation MCP61 USB Controller (rev a2) 00:02.1 USB Controller: nVidia Corporation MCP61 USB Controller (rev a2) 00:04.0 PCI bridge: nVidia Corporation MCP61 PCI bridge (rev a1) 00:05.0 Audio device: nVidia Corporation MCP61 High Definition Audio (rev a2) 00:06.0 IDE interface: nVidia Corporation MCP61 IDE (rev a2) 00:07.0 Bridge: nVidia Corporation MCP61 Ethernet (rev a2) 00:08.0 IDE interface: nVidia Corporation MCP61 SATA Controller (rev a2) 00:08.1 IDE interface: nVidia Corporation MCP61 SATA Controller (rev a2) 00:09.0 PCI bridge: nVidia Corporation MCP61 PCI Express bridge (rev a2) 00:0b.0 PCI bridge: nVidia Corporation MCP61 PCI Express bridge (rev a2) 00:0c.0 PCI bridge: nVidia Corporation MCP61 PCI Express bridge (rev a2) 00:0d.0 VGA compatible controller: nVidia Corporation GeForce 6100 nForce 430 (rev a2) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control lsmod Module Size Used by nls_iso8859_1 5120 1 nls_cp437 6784 1 vfat 14080 1 fat 54300 1 vfat af_packet 24840 2 rfcomm 42136 2 l2cap 26240 11 rfcomm bluetooth 57060 4 rfcomm,l2cap sr_mod 17828 0 ipv6 273892 14 powernow_k8 16960 1 cpufreq_ondemand 9612 1 cpufreq_powersave 2688 0 cpufreq_conservative 8072 0 cpufreq_userspace 5280 0 cpufreq_stats 7232 0 freq_table 5792 3 powernow_k8,cpufreq_ondemand,cpufreq_stats sbs 19592 0 dock 10656 0 ac 6148 0 video 18060 0 button 8976 0 container 5504 0 battery 11012 0 w83627ehf 19984 0 i2c_isa 5248 1 w83627ehf lp 12580 0 usb_storage 73024 3 snd_hda_intel 263712 4 snd_pcm_oss 44672 0 snd_mixer_oss 17664 1 snd_pcm_oss snd_pcm 80388 3 snd_hda_intel,snd_pcm_oss snd_seq_dummy 4740 0 snd_seq_oss 33152 0 snd_seq_midi 9600 0 serio_raw 8068 0 ide_cd 32672 0 cdrom 37536 2 sr_mod,ide_cd snd_rawmidi 25728 1 snd_seq_midi psmouse 39952 0 snd_seq_midi_event 8448 2 snd_seq_oss,snd_seq_midi parport_pc 37412 1 parport 37448 2 lp,parport_pc nvidia 6221648 34 k8temp 6656 0 pcspkr 4224 0 snd_seq 53232 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event agpgart 35016 1 nvidia snd_timer 24324 3 snd_pcm,snd_seq snd_seq_device 9228 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq snd 54660 15 snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device i2c_nforce2 7040 0 i2c_core 26112 4 w83627ehf,i2c_isa,nvidia,i2c_nforce2 shpchp 34580 0 pci_hotplug 32704 1 shpchp soundcore 8800 1 snd snd_page_alloc 11400 2 snd_hda_intel,snd_pcm evdev 11136 3 ext3 133896 3 jbd 60456 1 ext3 mbcache 9732 1 ext3 sg 36764 0 sd_mod 30336 9 libusual 18448 1 usb_storage sata_nv 20612 2 amd74xx 15260 0 [permanent] ide_core 116804 3 usb_storage,ide_cd,amd74xx ata_generic 8452 0 libata 125168 2 sata_nv,ata_generic scsi_mod 147084 5 sr_mod,usb_storage,sg,sd_mod,libata ohci_hcd 22916 0 forcedeth 51592 0 ehci_hcd 36108 0 usbcore 138248 5 usb_storage,libusual,ohci_hcd,ehci_hcd thermal 14344 1 processor 32072 2 powernow_k8,thermal fan 5764 1 fuse 47124 1 apparmor 40728 0 commoncap 8320 1 apparmor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/151440/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
