Apache PDFBox is a popular open-source library that facilitates java applications to work with PDF documents. Recently we encountered a Deadlock that surfaced in this library. In this post we have shared how we troubleshooted and identified the root cause... Continue Reading →
The application that we are going to discuss in this post was running on Elastic Beanstalk (EBS) service in Amazon Web Services (AWS). Intermittently this application was throwing HTTP 502 Bad Gateway error. In this post, let’s discuss how we... Continue Reading →
Java developers tend to use 'java.util.UUID#randomUUID()' API, to generate a UUID (Universally Unique Identifier) number (i.e., 'b8bbcbed-ca07-490c-8711-5118ee0af2f9'). Under certain circumstances, using this API can affect your application’s availability. Let’s discuss this API in this post with a real-world example. Video:... Continue Reading →
We had an outage in our online application GCeasy on Monday morning (PST) Oct' 11, 2021. When customers uploaded their Garbage Collection logs for analysis, the application was returning HTTP 504 error. HTTP 504 status code indicates that transactions are... Continue Reading →
we troubleshooted a CPU spike problem that surfaced in a major trading application in North America. All of a sudden, this application’s CPU started to spike up to 100%
Eclipse MAT, Heaphero are all popular java tools to analyze large size heap dumps. Recently we ran in to an interesting problem when trying to analyze a heap dump file in Eclipse MAT. Tool was crashing because of missing font... Continue Reading →
Recently we were troubleshooting a popular SaaS application. This application was slowing down intermittently. To recover from the problem, the application had to be restarted. This application was slowing down sometimes during high traffic volume periods; sometimes during low traffic... Continue Reading →
TD Bank (one of the largest bank in Canada) use our products: GCeasy, FastThread and HeapHero. Last week our architect Ram Lakshmanan was invited to TD Bank office in Toronto, Canada to give training to their Performance engineers and do critical system review (CSR)... Continue Reading →
Workday, leader in cloud ERP system for Finance, HR and planning is our customer. On Feb’ 21, 2019 Workday invited our architect Ram Lakshmanan to their headquarters located in Pleasanton, CA to give guest lecture on JVM performance engineering &... Continue Reading →