RHEL7: Task hang occurs on the function 'zap_pid_ns_processes'

Solution Verified - Updated -

Issue

  • Task hang occurs with below log:
[3549989.912706] INFO: task NIMSQL-Listener:118822 blocked for more than 120 seconds.
[3549989.932003] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[3549989.932839] NIMSQL-Listener D ffff9b26cba80000     0 118822 118044 0x00000082
[3549989.932844] Call Trace:
[3549989.932877]  [<ffffffffb5a9f400>] ? task_stopped_code+0x60/0x60
[3549989.932899]  [<ffffffffb617f1c9>] schedule+0x29/0x70
[3549989.932928]  [<ffffffffb5b33745>] zap_pid_ns_processes+0x145/0x1a0
[3549989.932930]  [<ffffffffb5aa1662>] do_exit+0xa12/0xa50
[3549989.932941]  [<ffffffffb5c6bca4>] ? mntput+0x24/0x40
[3549989.932953]  [<ffffffffb5c4aa66>] ? __fput+0x186/0x260
[3549989.932965]  [<ffffffffb5aa171f>] do_group_exit+0x3f/0xa0
[3549989.932971]  [<ffffffffb5ab252e>] get_signal_to_deliver+0x1ce/0x5e0
[3549989.932979]  [<ffffffffb5a2c527>] do_signal+0x57/0x6f0
[3549989.932990]  [<ffffffffb602d07d>] ? SYSC_accept4+0x1bd/0x230
[3549989.932992]  [<ffffffffb5c4b631>] ? __sb_end_write+0x31/0x70
[3549989.932994]  [<ffffffffb5c48752>] ? vfs_write+0x182/0x1f0
[3549989.932996]  [<ffffffffb5a2cc32>] do_notify_resume+0x72/0xc0
[3549989.933000]  [<ffffffffb618c23b>] int_signal+0x12/0x17

Environment

  • Red Hat Enterprise Linux 7

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