@vijaymanoharan - OK!!URL rewrite happens on the request before it get passed to dispatcher module. And this redirection will not carry the payload data. Please check, in browser console or using redirect trace(Chrome plugin) or in Apache redirect.log, whether the /bin/notification underwent any red...

Hi @vijaymanoharan - The dispatcher log shows 500 as the response code, are you sure that you see 404(not found) as response code? In case of 500, you need to look into error.log of your publish instance.   

Hi Bhawesh,We faced the same issue earlier, Adobe recommended us to add JVM init argument -Doak.segmentNodeStore.commitFairLock=true and to restart the cq5 service. It reduced the error rate but does not solve the issue completely.