JXRay 2.8u6 released

Posted on April 13, 2024

In this version: Improved anomaly analysis and added some new typesCorrectly recognizing when compact object headers are used in JDK 17 and newer with 32+G heapsUI improvements and bug fixes
Apache Pinot is a column-oritented distributed data store written in Java. It is open-source code used in applications where fast analytics is needed on immutable data. For example, at LinkedIn it was initially used to power the feature that allows members to see who has viewed their profile in real-time. Thanks to JXRay analysis, it has been recently discovered that in some installations, Pinot instances running with big (over 60G) heaps wasted a huge amount

JXRay 2.8u3 released

Posted on February 20, 2022

In this version: Detection of several new memory leak kinds added. In particular, objects held in memory only via anonymous lambda class instances, only via Builder class instances, etc.New anomaly detection: strings that contain exception stack traces and occupy a significant percentage of the heap. This signals that the app is in bad state, throwing exceptions all the time.Improved information about thread status in the “Thread stacks” report sectionUI improvements and bug fixes

Fixing Azkaban’s excessive memory usage

Posted on January 30, 2022

Project Azkaban is a batch workflow job scheduler created at LinkedIn to run Hadoop jobs. Azkaban resolves the ordering through job dependencies and provides an easy to use web user interface to maintain and track user’s workflows. Some Azkaban servers may grow huge, using tens of gigabytes of memory. Heap dumps that we analyzed were generated by the JVM running with 45G max heap. It routinely utilized more than 35G, had long GC pauses and was occasionally

JXRay 2.8u2 released

Posted on August 20, 2021

In this version: Detection of more anomalies in 3rd party code (underutilized Netty I/O buffers in Couchbase code, very big arrays generated by Jackson codec, etc.)Improved analysis of unfinalized objects that may cause GC degradationBug fixes and UI improvements