7c63f5455b
Today `SearchAsyncActionTests#testFanOutAndCollect` uses a simple `HashMap` for the `nodeToContextMap` variable, which is then accessed from multiple threads without, apparently, explicit synchronisation. This provides an explanation for the test failure identified in #29242 in which `.toString()` returns `"[]"` just before `.isEmpty` returns `false`, without any concurrent modifications. This change converts `nodeToContextMap` to a `newConcurrentMap()` so that this cannot occur. It also fixes a race condition in the detection of double-calling the subsequent search phase. Closes #29242. |
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