Time-Traveling Bugs: How a Two-Decade-Old Issue Still Haunts Software Scalability
Conference (INTERMEDIATE level)
Room C
In this session, we will explore how seemingly insignificant and often overlooked details in our code can significantly impact software performance, especially regarding concurrency. A two-decade-old JVM bug, initially discovered within Quarkus, is not a concern limited solely to low-level programmers; instead, it is a potential issue that could affect any codebase.
We will provide a comprehensive explanation of this problem, detailing how we identified and successfully addressed it in Drools, one of the most widely-used rule engines in the Java ecosystem. We will also introduce specific tools that every developer can employ to enhance their code's performance. Lastly, we’ll analyze the new features of Java 21 to see if they’re affected by the same problem.
We will provide a comprehensive explanation of this problem, detailing how we identified and successfully addressed it in Drools, one of the most widely-used rule engines in the Java ecosystem. We will also introduce specific tools that every developer can employ to enhance their code's performance. Lastly, we’ll analyze the new features of Java 21 to see if they’re affected by the same problem.
Luca Molteni
Red Hat
Luca Molteni is a Principal Software Engineer working for Red Hat on Business Automation. In Red Hat, he contributed to the evolution the open source Rule Engine called Drools to prepare it for the cloud era and to make it faster. He believes that open source drives innovation, promote community development, and empowers individuals.
Francesco Nigro
Red Hat
I've been working for many years in the computer field. In the last +10 years I've cultivated a strong passion in Java development and the under the hood details of OpenJDK, recently joined by C and (x86) ASM.
Big fan of DDD (Domain Driven Design) world, I've developed several Event-Sourcing high performance solutions in the medical and IoT field.
I'm an active member of various online communities on performance (https://groups.google.com/forum/#!forum/mechanical-sympathy), Principal (Software) Performance Engineer and Performance Lead for Red Hat on Quarkus, Red Hat Top Inventor (2019).
I've collaborated to different projects related high-performance computing both as committer and contributors eg Quarkus, Vert-x, Netty committer, JCTools author, PMC of ActiveMQ Apache Artemis (Messaging Broker), HdrHistogram, JGroups-raft, ...
Big fan of DDD (Domain Driven Design) world, I've developed several Event-Sourcing high performance solutions in the medical and IoT field.
I'm an active member of various online communities on performance (https://groups.google.com/forum/#!forum/mechanical-sympathy), Principal (Software) Performance Engineer and Performance Lead for Red Hat on Quarkus, Red Hat Top Inventor (2019).
I've collaborated to different projects related high-performance computing both as committer and contributors eg Quarkus, Vert-x, Netty committer, JCTools author, PMC of ActiveMQ Apache Artemis (Messaging Broker), HdrHistogram, JGroups-raft, ...