[9.1] Set coredump filter for Elasticsearch (#137300) #137445
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When a linux process dies and the core process memory is dumped, which parts of the memory to output are controlled by the coredump filter. By default the JVM dumps anonymous memory (ie heap and direct memory) and file-backed memory (ie mmaps), and private huge pages. However, the default of dumping file-backed memory for Elasticsearch is problematic; these can be enormous, and they also aren't very useful since the indices will likely be available when investigating the crash. This commit sets the coredump filter when running on Linux to omit file-backed memory from coredumps. Although the JVM has diagnostic VM options for controlling the filter, they end up causing the filter to be inherited, which is from the server CLI, another Java process, which has the file-backed memory bits set. Instead of using the JVM options we set it via the special proc filesystem.
rjernst
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:Core/Infra/Node Lifecycle
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Backports the following commits to 9.1: