Connection Acquisition Timeout set to zero will imply to always failing since.

Author: bigmontz

packages/bolt-connection/src/pool/pool.js

@@ -336,10 +336,12 @@ class Pool {
             } else {
               // failed to acquire a valid resource from the pool
               // return the pending request back to the pool
-              if (!this._acquireRequests[key]) {
-                this._acquireRequests[key] = []
+              if (!pendingRequest.isCompleted()) {
+                if (!this._acquireRequests[key]) {
+                  this._acquireRequests[key] = []
+                }
+                this._acquireRequests[key].unshift(pendingRequest)
               }
-              this._acquireRequests[key].unshift(pendingRequest)
             }
           })
       } else {

packages/neo4j-driver/test/driver.test.js

@@ -170,7 +170,7 @@ describe('#integration driver', () => {
     // Given
     const config = {
       maxConnectionPoolSize: 2,
-      connectionAcquisitionTimeout: 0,
+      connectionAcquisitionTimeout: 1000,
       encrypted: false
     }
     driver = neo4j.driver(