Fix Watcher deadlock that can cause in-abilty to index documents. (#41418) #41690
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…astic#41418) This commit removes the usage of the `BulkProcessor` to write history documents and delete triggered watches on a `EsRejectedExecutionException`. Since the exception could be handled on the write thread, the write thread can be blocked waiting on watcher threads (due to a synchronous method). This is problematic since those watcher threads can be blocked waiting on write threads. This commit also moves the handling of the exception to the generic threadpool to avoid submitting write requests from the write thread pool. fixes elastic#41390
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This commit removes the usage of the
BulkProcessorto write history documentsand delete triggered watches on a
EsRejectedExecutionException. Since theexception could be handled on the write thread, the write thread can be blocked
waiting on watcher threads (due to a synchronous method). This is problematic
since those watcher threads can be blocked waiting on write threads.
This commit also moves the handling of the exception to the generic threadpool
to avoid submitting write requests from the write thread pool.
This backport also includes changes needed for the 6.x branch of code.
fixes #41390