KB88892
Published: March 17, 2020
Revision: 1.0

GRV-EPIC-PR1 may lock up while running certain Node-RED nodes


Applies To:

Firmware for GRV-EPIC-PR1

Versions Affected:

All versions


Symptoms:

You may observe lock-up symptoms like the following:

  • GRV-EPIC-PR1 is unresponsive.
  • The LEDs on groov I/O modules all turn red.
  • Ethernet communication ceases.
If the groov EPIC processor is running Node-RED flows when these symptoms appear, it's possible that a third-party node installed on your processor has a memory leak. To determine if this might be the cause of these issues:
  1. Log into your groov EPIC processor with an ID that has administrator privileges.
  2. From the groov Manage Home page, click Node-RED.
  3. Record the value on the Memory Usage field.
  4. Wait 24 hours.
  5. Return to the groov Manage Node-RED page (steps 1 and 2).
  6. Compare the value in the Memory Usage field with the value you recorded from step 3.
If the difference is significant, there may be a memory leak that is causing your GRV-EPIC-PR1 to display "lock-up" symptoms.

Workaround:

Monitor Node-RED memory usage. If it starts to increase above typical, then restart Node-RED.

Resolution:

Opto 22 has resolved this issue and will include the fix in an upcoming release.

Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com


DISCLAIMER

This Opto 22 Knowledge Base ('OptoKB') article is intended to provide general technical information on a particular subject or subjects and is not an exhaustive treatment of such subjects. Accordingly, the information in this OptoKB article is not intended to constitute application, design, software, or other professional engineering advice or services. Opto 22 may modify the OptoKB articles at any time. Before making any decision or taking any action which might affect your equipment, you should consult a qualified professional.

OPTO 22 DOES NOT WARRANT THE COMPLETENESS, TIMELINESS, OR ACCURACY OF THE DATA CONTAINED IN THIS OPTOKB ARTICLE AND MAY MAKE CHANGES THERETO AT ANY TIME AT ITS SOLE DISCRETION WITHOUT NOTICE. FURTHER, ALL INFORMATION CONVEYED HEREBY IS PROVIDED TO USERS 'AS IS.' IN NO EVENT SHALL OPTO 22 BE LIABLE FOR ANY DAMAGES OF ANY KIND INCLUDING DIRECT, INDIRECT INCIDENTAL, CONSEQUENTIAL, LOSS PROFIT, OR DAMAGE, EVEN IF OPTO 22 HAS BEEN ADVISED ON THE POSSIBILITY OF SUCH DAMAGES.

OPTO 22 DISCLAIMS ALL WARRANTIES WHETHER EXPRESSED OR IMPLIED WITH RESPECT TO THE INFORMATION (INCLUDING HARDWARE, SOFTWARE, AND/OR FIRMWARE) PROVIDED HEREBY, INCLUDING THE IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTIBILITY, AND NON-INFRINGEMENT. Note that certain jurisdictions do not sanction the exclusion of implied warranties: thus, this disclaimer may not apply to you.

Copyright © 2020 Opto 22. All rights reserved.