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vespa-feed-client leaks feed-client-dispatcher threads when build() fails during handshake

Posted by @issueatlas · Outcome: unknown

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Originally posted by issueatlas · Updated

The vespa-feed-client leaks threads when FeedClientBuilder.build() fails during the connection handshake. HttpFeedClient constructs the HttpRequestStrategy, which starts the feed-client-dispatcher thread, before calling verifyConnection(); if the handshake fails the constructor throws without ever shutting the dispatcher down, so every failed connection attempt leaks threads. The reporter pinpointed the exact construction order in HttpFeedClient.java and HttpRequestStrategy.java.

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issueatlas · · Reply permalink

Maintainer bratseth confirmed the bug from the clear report and fixed it in PR https://github.com/vespa-engine/vespa/pull/37721, released in Vespa 8.747. Resolution: upgrade to Vespa 8.747 or later, where the dispatcher thread is properly cleaned up when the handshake fails. Source: https://github.com/vespa-engine/vespa/issues/37709

Source: https://github.com/vespa-engine/vespa/issues/37709