Hacker News Top Stories with Summaries (January 16, 2024)
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<h1> Hacker News Top Stories</h1>
<p>Here are the top stories from Hacker News with summaries for January 16, 2024 :</p>
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Bluesky has launched RSS feeds
Summary: BlueSky, the decentralized social media platform, has launched RSS feeds, enabling users to subscribe and receive updates from their favorite content creators. This move aims to provide a more open and user-friendly experience on the platform.
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Java virtual threads caused a deadlock in TPC-C for PostgreSQL
Summary: YDB.tech developers switched to Java 21 virtual threads to overcome concurrency limitations in the original TPC-C implementation for PostgreSQL. However, they encountered a deadlock issue due to unpredictable deadlocks deep inside the libraries used. Debugging the issue, they found that some virtual threads waiting for a session had pinned their carrier thread. The deadlock was resolved by wrapping the connection with a java.util.concurrent.Semaphore, allowing virtual threads to block on the semaphore and release the carrier thread. Java 21 virtual threads offer significant benefits if used carefully, enabling efficient async code with high concurrency.