Technical Alert #7: Issue in shard synchronization. - ArangoDB

Sign up for ArangoDB Cloud

Before signing up, please accept our terms & conditions and privacy policy.

What to expect after you signup
You can try out ArangoDB Cloud FREE for 14 days. No credit card required and you are not obligated to keep using ArangoDB Cloud.

At the end of your free trial, enter your credit card details to continue using ArangoDB Cloud.

If you decide that ArangoDB Cloud is not (yet) for you, you can simply leave and come back later.

Technical Alert #7: Issue in shard synchronization.

Technical Alert #7: Issue in shard synchronization.

On Thursday, February 3rd, we identified a critical issue in the shard replication mechanism that could lead to segmentation violations at runtime.

Do not roll out this version in cluster deployments. A fix is being prepared and tested. If you have already upgraded a cluster deployment to 3.8.5 and do not experience database server crashes, do not downgrade. Please install the fixed or any later version as soon as they become available. 

Issue Description

An internal asynchronous call on shard followers accesses, in rare cases when shard synchronization with the leader is aborted prematurely, a voided register address leading to segmentation violation.

Issue Resolution

Review all database server log files of a cluster for spurious restarts, which were not commanded by database administrators. If and only if such restarts are found, please downgrade to 3.8.4 or any version available greater than 3.8.5.

Additional Questions

In case of any questions, please contact us. ArangoDB Customers can open a support ticket in our Support Platform.