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CrashPlan Support

TCP Packet QoS Settings Not Applied To The CrashPlan App

Applies to:
  • CrashPlan for Home

Overview

This article describes the solution for a known issue in which the CrashPlan app does not apply the TCP packet QoS priority settings.

Affects

Devices that both:

  • Use IPv4 (or a mix of IPv4 and IPv6)
  • Use CrashPlan app version 4.7.0 or later

Considerations

You must repeat these steps each time you upgrade the CrashPlan app. These changes are reverted during the upgrade process.

Recommended solution

To enforce the TCP Packet QoS setting:

  1. On the device where the CrashPlan app is installed, navigate to the CrashPlan app configuration file:
    • Windows
      • Installed for everyone: C:\Program Files\CrashPlan\CrashPlanService.ini
      • Installed per user: C:\Users\<username>\AppData\<Local|Roaming>\Programs\CrashPlan\CrashPlanService.ini
    • OS X
      • Installed for everyone: /Library/LaunchDaemons/com.crashplan.engine.plist
      • Installed per user: ~/Library/LaunchAgents/com.crashplan.engine.plist
    • Linux: /usr/local/crashplan/bin/run.conf
  2. Open the file in a text editor.
  3. Edit the file:
  • Windows
    Add this line to the end of Virtual Machine Parameters:-Djava.net.preferIPv4Stack=true
  • OS X
    Under the line <string>-Djava.awt.headless=true</string>, paste the following line:
    <string>-Djava.net.preferIPv4Stack=true</string>
  • Linux
    Add this line to the end of SRV_JAVA_OPTS:
    -Djava.net.preferIPv4Stack=true
  1. Save your changes.
  2. Restart the device.

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