chromeos4-row10-rack1-host8 looks like it died mid-testing at http://stainless/browse/chromeos-autotest-results/231016631-chromeos-test/, but we were able to reconnect to it:
2018/08/25 12:10:12 Started test ui.SessionManagerRespawn
2018/08/25 12:10:12 [12:10:12.409] Getting initial session_manager process
2018/08/25 12:10:12 [12:10:12.413] Initial session_manager process is 14844
2018/08/25 12:10:12 [12:10:12.413] Killing 14844
2018/08/25 12:10:12 [12:10:12.413] Waiting for session_manager to respawn
2018/08/25 12:12:12 [12:12:12.401] Error at respawn.go:58: Failed waiting for session_manager to respawn: context deadline exceeded (/sbin/session_manager process not found)
...
2018/08/25 12:12:12 Completed test ui.SessionManagerRespawn in 2m0.006s with 1 error(s)
2018/08/25 12:12:12 Started test video.PlayH264
2018/08/25 12:12:12 [12:12:12.402] Restarting ui job
2018/08/25 12:12:12 [12:12:12.408] External command failed: exit status 1
...
2018/08/25 12:15:23 Failed to run tests: context deadline exceeded
2018/08/25 12:15:23 Lost SSH connection to chromeos4-row10-rack1-host8:22: EOF
2018/08/25 12:15:23 Collecting system information
2018/08/25 12:15:23 Connecting to chromeos4-row10-rack1-host8:22
2018/08/25 12:15:23 Copying /tmp/tast_logs.543367337 from host to /usr/local/autotest/results/lxc_job_folder/tast/results/system_logs
2018/08/25 12:15:24 Cleaning /tmp/tast_logs.543367337 on host
2018/08/25 12:15:24 Copying /tmp/tast_crashes.640965108 from host to /usr/local/autotest/results/lxc_job_folder/tast/results/crashes
2018/08/25 12:15:24 Cleaning /tmp/tast_crashes.640965108 on host
The messages log appears to suggest there might be a binder bug in the kernel:
...
2018-08-25T12:10:12.483953-07:00 NOTICE ui-respawn[15504]: ui died on signal KILL.
2018-08-25T12:10:12.493743-07:00 INFO crash_reporter[15497]: libminijail[15497]: mount /dev/log -> /dev/log type ''
2018-08-25T12:10:12.514747-07:00 INFO crash_reporter[15497]: Processing selinux violation: always collect from developer builds
2018-08-25T12:10:12.515176-07:00 INFO crash_reporter[15497]: Accessing crash dir '/var/spool/crash' via symlinked handle '/proc/self/fd/7'
2018-08-25T12:10:12.568949-07:00 INFO crash_reporter[15510]: libminijail[15510]: mount /dev/log -> /dev/log type ''
2018-08-25T12:10:12.573338-07:00 NOTICE ui-respawn[15519]: Respawning ui.
2018-08-25T12:10:12.582604-07:00 WARNING cryptohomed[840]: RemoveKeyset: key to remove not found
2018-08-25T12:10:12.586729-07:00 INFO crash_reporter[15510]: Processing selinux violation: always collect from developer builds
2018-08-25T12:10:12.587163-07:00 INFO crash_reporter[15510]: Accessing crash dir '/var/spool/crash' via symlinked handle '/proc/self/fd/7'
2018-08-25T12:10:12.587351-07:00 WARNING crash_reporter[15510]: Failed to write audit message to /proc/self/fd/7/selinux_violation.20180825.121012.0.log: File exists
2018-08-25T12:10:12.792316-07:00 INFO chapsd[755]: Token at /home/root/df31274fe57fcc97863e0c801bf994272a829ed4/chaps has been removed from slot 1
2018-08-25T12:10:15.095182-07:00 ERR chapsd[755]: GetSlotInfo - CKR_SLOT_ID_INVALID
2018-08-25T12:10:15.100166-07:00 ERR chapsd[755]: FindObjectsInit - CKR_SESSION_HANDLE_INVALID
2018-08-25T12:10:15.101807-07:00 ERR chapsd[755]: FindObjectsInit - CKR_SESSION_HANDLE_INVALID
2018-08-25T12:10:23.599479-07:00 WARNING cryptohomed[840]: ManageCCDPwd is not supported
2018-08-25T12:10:42.143517-07:00 WARNING kernel: [ 812.589605] audit_printk_skb: 18 callbacks suppressed
2018-08-25T12:10:42.143531-07:00 NOTICE kernel: [ 812.589611] audit: type=1400 audit(1535224242.141:1710): avc: granted { execute } for pid=15689 comm="python" name="dash" dev="dm-0" ino=57432 scontext=u:r:cros_init:s0 tcontext=u:object_r:sh_exec:s0 tclass=file
2018-08-25T12:10:42.143532-07:00 NOTICE kernel: [ 812.589863] audit: type=1400 audit(1535224242.141:1711): avc: granted { execute } for pid=15689 comm="check_ethernet." path="/bin/dash" dev="dm-0" ino=57432 scontext=u:r:cros_init:s0 tcontext=u:object_r:sh_exec:s0 tclass=file
2018-08-25T12:11:20.596533-07:00 ERR kernel: [ 851.041760] INFO: rcu_preempt detected stalls on CPUs/tasks:
2018-08-25T12:11:20.596548-07:00 ERR kernel: [ 851.041767] Tasks blocked on level-0 rcu_node (CPUs 0-1): P13889
2018-08-25T12:11:20.596549-07:00 ERR kernel: [ 851.041773] (detected by 0, t=60002 jiffies, g=93150, c=93149, q=744175)
2018-08-25T12:11:20.596549-07:00 INFO kernel: [ 851.041778] Binder:1765_1 R running task 0 13889 11440 0x00000004
2018-08-25T12:11:20.596550-07:00 WARNING kernel: [ 851.041784] ffff880018598f00 ffff88017ec15900 ffff880167362ac0 ffff8801062f4740
2018-08-25T12:11:20.596551-07:00 WARNING kernel: [ 851.041791] ffff880057c1dee8 ffff88013bfeb9d0 ffffffffa51e72da ffffffffa51eb970
2018-08-25T12:11:20.596552-07:00 WARNING kernel: [ 851.041797] 00000001a51eb964 ffffffffa51eb970 ffffffffa51eb964 937f28651874724d
2018-08-25T12:11:20.596553-07:00 WARNING kernel: [ 851.041803] Call Trace:
2018-08-25T12:11:20.596553-07:00 WARNING kernel: [ 851.041812] [<ffffffffa51e72da>] ? __schedule+0x3d6/0x92a
2018-08-25T12:11:20.596554-07:00 WARNING kernel: [ 851.041816] [<ffffffffa51eb970>] ? __switch_to_asm+0x40/0x70
2018-08-25T12:11:20.596555-07:00 WARNING kernel: [ 851.041820] [<ffffffffa51eb970>] ? __switch_to_asm+0x40/0x70
2018-08-25T12:11:20.596556-07:00 WARNING kernel: [ 851.041823] [<ffffffffa51eb964>] ? __switch_to_asm+0x34/0x70
2018-08-25T12:11:20.596557-07:00 WARNING kernel: [ 851.041826] [<ffffffffa51e799e>] preempt_schedule_irq+0x49/0x86
2018-08-25T12:11:20.596557-07:00 WARNING kernel: [ 851.041830] [<ffffffffa51ec1ae>] retint_kernel+0x1b/0x1d
2018-08-25T12:11:20.596558-07:00 WARNING kernel: [ 851.041834] [<ffffffffa4c95780>] ? __d_lookup+0x59/0x15f
2018-08-25T12:11:20.596559-07:00 WARNING kernel: [ 851.041837] [<ffffffffa4c9577c>] ? __d_lookup+0x55/0x15f
2018-08-25T12:11:20.596560-07:00 WARNING kernel: [ 851.041840] [<ffffffffa4c9570e>] d_lookup+0x2b/0x44
2018-08-25T12:11:20.596560-07:00 WARNING kernel: [ 851.041844] [<ffffffffa4be099d>] d_hash_and_lookup+0x48/0x51
2018-08-25T12:11:20.596565-07:00 WARNING kernel: [ 851.041847] [<ffffffffa4c1f402>] proc_flush_task+0xe2/0x194
2018-08-25T12:11:20.596566-07:00 WARNING kernel: [ 851.041851] [<ffffffffa4ab7832>] release_task+0x3d/0x382
2018-08-25T12:11:20.596567-07:00 WARNING kernel: [ 851.041854] [<ffffffffa51eaf60>] ? _raw_spin_unlock_bh+0x1c/0x1e
2018-08-25T12:11:20.596568-07:00 WARNING kernel: [ 851.041857] [<ffffffffa4ab823b>] do_exit+0x56d/0x7c9
2018-08-25T12:11:20.596568-07:00 WARNING kernel: [ 851.041861] [<ffffffffa4ab8729>] do_group_exit+0x96/0xa5
2018-08-25T12:11:20.596569-07:00 WARNING kernel: [ 851.041864] [<ffffffffa4ac1917>] get_signal+0x135/0x56e
2018-08-25T12:11:20.596570-07:00 WARNING kernel: [ 851.041868] [<ffffffffa4a4bc4d>] do_signal+0x35/0x53c
2018-08-25T12:11:20.596571-07:00 WARNING kernel: [ 851.041871] [<ffffffffa4bd05e1>] ? __check_object_size+0xca/0x16f
2018-08-25T12:11:20.596571-07:00 WARNING kernel: [ 851.041875] [<ffffffffa4b617f0>] ? __might_sleep+0x41/0x7d
2018-08-25T12:11:20.596572-07:00 WARNING kernel: [ 851.041879] [<ffffffffa4ab2143>] prepare_exit_to_usermode+0x75/0x77
2018-08-25T12:11:20.596573-07:00 WARNING kernel: [ 851.041883] [<ffffffffa4ab2188>] syscall_return_slowpath+0x43/0x14c
2018-08-25T12:11:20.596573-07:00 WARNING kernel: [ 851.041886] [<ffffffffa4c92ae5>] ? SyS_ioctl+0x64/0x256
2018-08-25T12:11:20.596574-07:00 WARNING kernel: [ 851.041889] [<ffffffffa51eb734>] int_ret_from_sys_call+0x25/0x93
2018-08-25T12:11:20.596575-07:00 INFO kernel: [ 851.041892] Binder:1765_1 R running task 0 13889 11440 0x00000004
2018-08-25T12:11:20.596576-07:00 WARNING kernel: [ 851.041897] ffff880018598f00 ffff88017ec15900 ffff880167362ac0 ffff8801062f4740
2018-08-25T12:11:20.596576-07:00 WARNING kernel: [ 851.041903] ffff880057c1dee8 ffff88013bfeb9d0 ffffffffa51e72da ffffffffa51eb970
2018-08-25T12:11:20.596577-07:00 WARNING kernel: [ 851.041909] 00000001a51eb964 ffffffffa51eb970 ffffffffa51eb964 937f28651874724d
2018-08-25T12:11:20.596578-07:00 WARNING kernel: [ 851.041915] Call Trace:
2018-08-25T12:11:20.596579-07:00 WARNING kernel: [ 851.041919] [<ffffffffa51e72da>] ? __schedule+0x3d6/0x92a
2018-08-25T12:11:20.596579-07:00 WARNING kernel: [ 851.041923] [<ffffffffa51eb970>] ? __switch_to_asm+0x40/0x70
2018-08-25T12:11:20.596580-07:00 WARNING kernel: [ 851.041925] [<ffffffffa51eb970>] ? __switch_to_asm+0x40/0x70
2018-08-25T12:11:20.596581-07:00 WARNING kernel: [ 851.041928] [<ffffffffa51eb964>] ? __switch_to_asm+0x34/0x70
2018-08-25T12:11:20.596582-07:00 WARNING kernel: [ 851.041932] [<ffffffffa51e799e>] preempt_schedule_irq+0x49/0x86
2018-08-25T12:11:20.596582-07:00 WARNING kernel: [ 851.041935] [<ffffffffa51ec1ae>] retint_kernel+0x1b/0x1d
2018-08-25T12:11:20.596583-07:00 WARNING kernel: [ 851.041938] [<ffffffffa4c95780>] ? __d_lookup+0x59/0x15f
2018-08-25T12:11:20.596584-07:00 WARNING kernel: [ 851.041941] [<ffffffffa4c9577c>] ? __d_lookup+0x55/0x15f
2018-08-25T12:11:20.596584-07:00 WARNING kernel: [ 851.041944] [<ffffffffa4c9570e>] d_lookup+0x2b/0x44
2018-08-25T12:11:20.596585-07:00 WARNING kernel: [ 851.041947] [<ffffffffa4be099d>] d_hash_and_lookup+0x48/0x51
2018-08-25T12:11:20.596586-07:00 WARNING kernel: [ 851.041950] [<ffffffffa4c1f402>] proc_flush_task+0xe2/0x194
2018-08-25T12:11:20.596586-07:00 WARNING kernel: [ 851.041953] [<ffffffffa4ab7832>] release_task+0x3d/0x382
2018-08-25T12:11:20.596587-07:00 WARNING kernel: [ 851.041956] [<ffffffffa51eaf60>] ? _raw_spin_unlock_bh+0x1c/0x1e
2018-08-25T12:11:20.596588-07:00 WARNING kernel: [ 851.041959] [<ffffffffa4ab823b>] do_exit+0x56d/0x7c9
2018-08-25T12:11:20.596589-07:00 WARNING kernel: [ 851.041962] [<ffffffffa4ab8729>] do_group_exit+0x96/0xa5
2018-08-25T12:11:20.596589-07:00 WARNING kernel: [ 851.041965] [<ffffffffa4ac1917>] get_signal+0x135/0x56e
2018-08-25T12:11:20.596590-07:00 WARNING kernel: [ 851.041969] [<ffffffffa4a4bc4d>] do_signal+0x35/0x53c
2018-08-25T12:11:20.596591-07:00 WARNING kernel: [ 851.041972] [<ffffffffa4bd05e1>] ? __check_object_size+0xca/0x16f
2018-08-25T12:11:20.596592-07:00 WARNING kernel: [ 851.041975] [<ffffffffa4b617f0>] ? __might_sleep+0x41/0x7d
2018-08-25T12:11:20.596592-07:00 WARNING kernel: [ 851.041979] [<ffffffffa4ab2143>] prepare_exit_to_usermode+0x75/0x77
2018-08-25T12:11:20.596593-07:00 WARNING kernel: [ 851.041982] [<ffffffffa4ab2188>] syscall_return_slowpath+0x43/0x14c
2018-08-25T12:11:20.596594-07:00 WARNING kernel: [ 851.041985] [<ffffffffa4c92ae5>] ? SyS_ioctl+0x64/0x256
2018-08-25T12:11:20.596594-07:00 WARNING kernel: [ 851.041988] [<ffffffffa51eb734>] int_ret_from_sys_call+0x25/0x93
2018-08-25T12:13:13.123492-07:00 INFO kernel: [ 0.000000] Initializing cgroup subsys cpuset
2018-08-25T12:13:13.123542-07:00 INFO kernel: [ 0.000000] Initializing cgroup subsys cpu
2018-08-25T12:13:13.123547-07:00 INFO kernel: [ 0.000000] Initializing cgroup subsys cpuacct
2018-08-25T12:13:13.123552-07:00 NOTICE kernel: [ 0.000000] Linux version 4.4.149-14750-g9f2c000df175 (chrome-bot@swarm-cros-397) (Chromium OS 7.0_pre333878_p20180808-r3 clang version 7.0.0 (/var/cache/chromeos-cache/distfiles/host/egit-src/clang.git 38ad3c9160e5814ec8cad29a990cf76730c5f20e) (/var/cache/chromeos-cache/distfiles/host/egit-src/llvm.git 40c66c3d40377cf85640b3a35e6ec5c5b1cbc41f) (based on LLVM 7.0.0svn)) #1 SMP PREEMPT Sat Aug 25 04:12:06 PDT 2018
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