NetWorker REST API fails with Internal Server Error 500

An example output for the curl command-line utility:
 

# curl -k -v -H "Authorization: Basic YmFhc2hjOkUzdHZvdUVrV3ZpQdN6" -H "Accept: application/json" -X GET https://MY_NSR_SERVER:9090/nwrestapi/v3/global/
* About to connect() to MY_NSR_SERVER port 9090 (#0)
* Trying XXX.XXX.XXX.XXX...
* Connected to MY_NSR_SERVER (XXX.XXX.XXX.XXX) port 9090 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
* skipping SSL peer certificate verification
* SSL connection using TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
* Server certificate:
* subject: CN=MY_NSR_SERVER.MY_DOMAIN,OU=NetWorker,O=DELL,L=Round Rock,ST=TX,C=US
* start date: Sep 14 HH:MM:SS YYYY GMT
* expire date: Sep 08 HH:MM:SS YYYY GMT
* common name: MY_NSR_SERVER.MY_DOMAIN
* issuer: CN=MY_NSR_SERVER.MY_DOMAIN,OU=NetWorker,O=DELL,L=Round Rock,ST=TX,C=US
> GET /nwrestapi/v3/global/ HTTP/1.1
> User-Agent: curl/7.29.0
> Host: MY_NSR_SERVER:9090
> Authorization: Basic YmFhc2hjOkUzdHZvdUVrV3ZpQdN6
> Accept: application/json
>
< HTTP/1.1 500
< Content-Security-Policy: frame-ancestors 'none';script-src' 'self';object-src 'self'
< Strict-Transport-Security: max-age=31622400; includeSubDomains
< X-XSS-Protection: 1; mode=block
< Date: Tue, 04 Jan 2022 23:42:12 GMT
< Cache-Control: no-cache,no-store,must-revalidate
< Pragma: no-cache
< Expires: 0
< Content-Type: application/json
< Transfer-Encoding: chunked
< Connection: close
< Server: NSR SERVICES for Authentication
<
* Closing connection 0
{"message":"java.net.SocketTimeoutException: SocketTimeoutException invoking https://localhost:9090/auth-server/api/v1/sec/authenticate [localhost]: Read timed out","status":{"code":500,"codeClass":"Server Error","reasonPhrase":"Internal Server Error"},"timestamp":"2022-01-04T18:42:12-05:00","userAgentRequest":{"headers":[{"name":"Accept","value":"application/json"},{"name":"Accept-Language"},{"name":"Content-Type"}],"method":"GET","url":https://MY_NSR_SERVER:9090/nwrestapi/v3/global/ [MY_NSR_SERVER]},"version":"19.4.0.5.Build.222"}
#

The /nsr/logs/restapi/restapi.log shows:

YYYY-MM-DD HH:MM:SS WARN  [https-jsse-nio-9090-exec-11134] o.a.c.p.PhaseInterceptorChain - Interceptor for {https://localhost:9090/auth-server/api/v1/sec/authenticate}WebClient has thrown exception, unwinding now
org.apache.cxf.interceptor.Fault: Could not receive Message.
	at org.apache.cxf.interceptor.MessageSenderInterceptor$MessageSenderEndingInterceptor.handleMessage(MessageSenderInterceptor.java:65) ~[cxf-core-3.3.7.jar:3.3.7]
	at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308) [cxf-core-3.3.7.jar:3.3.7]
	at org.apache.cxf.jaxrs.client.AbstractClient.doRunInterceptorChain(AbstractClient.java:704) [cxf-rt-rs-client-3.3.7.jar:3.3.7]
...
	... 64 common frames omitted
YYYY-MM-DD HH:MM:SS ERROR [https-jsse-nio-9090-exec-11134] c.e.n.w.WebApiExceptionMapper - Status 'Internal Server Error', msg: java.net.SocketTimeoutException: SocketTimeoutException invoking https://localhost:9090/auth-server/api/v1/sec/authenticate: Read timed out
javax.ws.rs.ProcessingException: java.net.SocketTimeoutException: SocketTimeoutException invoking https://localhost:9090/auth-server/api/v1/sec/authenticate: Read timed out
	at org.apache.cxf.jaxrs.client.AbstractClient.checkClientException(AbstractClient.java:632) ~[cxf-rt-rs-client-3.3.7.jar:3.3.7]
...
	... 64 common frames omitted

The remote authentication server must be specified in the REST API command with the X-NW-AUTHC-BASE-URL header.

Example REST API global query:

curl -k -v -H "Accept: application/json" --user myuser@mydomain -X GET https://NSR_NAME:9090/nwrestapi/v3/global/

Example REST API global query with a remote authentication server

curl -k -v -H "X-NW-AUTHC-BASE-URL:MY_AUTH_NAME.MY_DOMAIN:9090" -H "Accept: application/json" --user myuser@mydomain -X GET https://NSR_NAME:9090/nwrestapi/v3/global/