NetWorker: REST API requests fail with HTTP 500 java.lang.UnsatisfiedLinkError
Summary: NetWorker Representational State Transfer Application Programming Interface (REST API) operations fail with HTTP 500. The page reports java.lang.UnsatisfiedLinkError, stating that librestapi64.so is already loaded in another classloader. ...
This article applies to
This article does not apply to
This article is not tied to any specific product.
Not all product versions are identified in this article.
Symptoms
NetWorker REST API operations fail with HTTP 500 (Internal Server Error).
Accessing any REST API end point from a web browser (https://NW_SERVER_ADDRESS:9090/nwrestapi/v3/global) reports:
There are no errors or information logged in the /nsr/logs/restapi/restapi.log.
Cause
The NetWorker server operating system (OS) is not officially supported by the NetWorker version used.
For example, this issue appeared after upgrading an existing NetWorker server from Red Hat 7.9 to Red Hat 9.5 while using NetWorker 19.9. NetWorker 19.9 does not officially support Red Hat 9.5. This issue can also be observed without any upgrades, if a new NetWorker server version is installed on an unsupported operating system.
Resolution
Ensure that the NetWorker version and server operating system meet support requirements.
The compatibility matrix can be found under: https://elabnavigator.dell.com/eln/modernHomeAutomatedTiles?page=NetWorker
Download the NetWorker version-specific guide from the NETWORKER & ALL COMPONENTS, REPORTS, MODULES section.
Ensure that the Java Runtime Environment (JRE), or NetWorker Runtime Environment (NRE) are up-to-date, and configured correctly: NetWorker Runtime Environment (NRE): Introduction and Installation
Affected Products
NetWorkerProducts
NetWorker FamilyArticle Properties
Article Number: 000320862
Article Type: Solution
Last Modified: 13 May 2025
Version: 2
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.