diff --git a/src/component/SeleniumBrowser.js b/src/component/SeleniumBrowser.js
index 77a2b89..75b5ea0 100644
--- a/src/component/SeleniumBrowser.js
+++ b/src/component/SeleniumBrowser.js
@@ -47,13 +47,20 @@ class SeleniumBrowser {
         })
 
         this.pool.use(driver => {
+            logger.debug({
+                spare: this.pool.spareResourceCapacity,
+                size: this.pool.size,
+                available: this.pool.available,
+                borrowed: this.pool.borrowed,
+                pending: this.pool.pending
+            }, 'Pool info')
             return new Promise((resolve, reject) => {
-                if(this.pool.available == 0) this.config.browserFullCount++
-                if(this.config.browserFullCount > 100) {
+                if (this.pool.available == 0) this.config.browserFullCount++
+                if (this.config.browserFullCount > 100) {
                     this.pool.clear()
                     this.config.browserFullCount = 0
                     reject(new Error('browser full count more than 100 times'))
-                }else {
+                } else {
                     resolve(driver)
                 }
             })