fix: span names

server/src/main/java/com/epam/aidial/core/server/security/IdentityProvider.java

@@ -182,7 +182,13 @@ public static DecodedJWT decodeJwtToken(String encodedToken) {
     }
 
     private Future<JwkResult> getJwk(String kid) {
-        return cache.computeIfAbsent(kid, key -> vertx.executeBlocking(() -> {
+        /* The result of vertx.executeBlocking is a future that contains Vert.x context which is valid during a request
+         * execution. So, if we put that future in a cache, it will contain a context from the initial request, that
+         * may be invalid for further requests. For this reason, when we retrieve the future from the cache, we must
+         * extract the value and put it into another future (Promise) which holds a valid context of a current request.
+         * */
+        Promise<JwkResult> promise = Promise.promise();
+        cache.computeIfAbsent(kid, key -> vertx.executeBlocking(() -> {
             JwkResult jwkResult;
             long currentTime = System.currentTimeMillis();
             try {
@@ -192,7 +198,8 @@ private Future<JwkResult> getJwk(String kid) {
                 jwkResult = new JwkResult(null, e, currentTime + negativeCacheExpirationMs);
             }
             return jwkResult;
-        }, false));
+        }, false)).onSuccess(promise::complete).onFailure(promise::fail);
+        return promise.future();
     }
 
     private Future<DecodedJWT> verifyJwt(DecodedJWT jwt) {