Error: Request failed with status code 500
ZEN 2.0.18 Tech Note - Node unable to pass challenge
Error message (from zen when creating a shielded transaction - z_sendmany):
error code: -1
error message:
getrandom
Error (from nodetracker - Exception is created)
– ERROR Challenge: unable to create and send transaction.
– { Error: Request failed with status code 500
Background
Some nodes are no longer able to pass a challenge after upgrading to 2.0.18. The apparent cause is an update in one of the dependent libraries that provides a random generator to zen. The library was enhanced to provide entropy based on the operating system. Some virtual systems are unable to provide a proper level of entropy due to sharing between multiple environments.
Link to issue:
https://github.com/ZencashOfficial/zen/issues/184
Affected Systems
The common element for affected systems are VPSs based on OpenVZ. During testing attempts were made to install other applications to increase entropy and these failed to run properly.
These providers have been reported using OpenVZ for some of their VPSs. Other providers may also use it.
- VPSDime
- VIRMACH
- MEGAZONEHOSTING
- TIME4VPS
- STRATO
To determine if a VPS uses OpenVZ run the following at the command prompt:
systemd-detect-virt
Status: Won't Fix
The intent of the change is a security enhancement. There are no plans at this point to roll back to a prior version of the dependent library.
Suggested Solution
Since it was found that the entropy level of OpenVZ systems had been a known issue, the suggested action is to move the affected nodes to another provider who does not use OpenVZ
Guide for moving a node
https://www.zen-solutions.io/updated-guide-for-migrating-your-node-to-a-new-vps-provider/
Error: Request failed with status code 500
ZEN 2.0.18 Tech Note - Node unable to pass challenge
Error message (from zen when creating a shielded transaction - z_sendmany):
error code: -1
error message:
getrandom
Error (from nodetracker - Exception is created)
– ERROR Challenge: unable to create and send transaction.
– { Error: Request failed with status code 500
Background
Some nodes are no longer able to pass a challenge after upgrading to 2.0.18. The apparent cause is an update in one of the dependent libraries that provides a random generator to zen. The library was enhanced to provide entropy based on the operating system. Some virtual systems are unable to provide a proper level of entropy due to sharing between multiple environments.
Link to issue:
https://github.com/ZencashOfficial/zen/issues/184
Affected Systems
The common element for affected systems are VPSs based on OpenVZ. During testing attempts were made to install other applications to increase entropy and these failed to run properly.
These providers have been reported using OpenVZ for some of their VPSs. Other providers may also use it.
To determine if a VPS uses OpenVZ run the following at the command prompt:
Status: Won't Fix
The intent of the change is a security enhancement. There are no plans at this point to roll back to a prior version of the dependent library.
Suggested Solution
Since it was found that the entropy level of OpenVZ systems had been a known issue, the suggested action is to move the affected nodes to another provider who does not use OpenVZ
Guide for moving a node
https://www.zen-solutions.io/updated-guide-for-migrating-your-node-to-a-new-vps-provider/