fbe27664a6
Today we add a prefix when logging within Elasticsearch. This prefix contains the node name, and index and shard-level components if appropriate. Due to some implementation details with Log4j 2 , this does not work for integration tests; instead what we see is the node name for the last node to startup. The implementation detail here is that Log4j 2 there is only one logger for a name, message factory pair, and the key derived from the message factory is the class name of the message factory. So, when the last node starts up and starts setting prefixes on its message factories, it will impact the loggers for the other nodes. Additionally, the prefixes are lost when logging an exception. This is due to another implementation detail in Log4j 2. Namely, since we log exceptions using a parameterized message, Log4j 2 decides that that means that we do not want to use the message factory that we have provided (the prefix message factory) and so logs the exception without the prefix. This commit fixes both of these issues. Relates #20429 |
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