This article provides recovery actions to take when an SRX device fails to boot and displays a deadlock-related panic error.

The SRX device is stuck during the boot process and displays an error similar to:

panic: deadlres_td_on_lock: possible deadlock detected

If the device encounters this error and fails to boot normally, perform the following recovery steps:

1. Power Cycle the Device
   Unplug the power cable from the device, wait for approximately one minute, and then reconnect it to allow the device to reboot. This can help clear transient issues causing the boot failure.

2. USB Re-imaging (If Issue Persists)
   If the device continues to encounter the same error after a power cycle, proceed with a USB-based re-imaging of the device. This involves reinstalling the Junos OS image using a USB drive to restore the system to a functional state.