SERVER-38295 ReplSetMonitor::getHostOrRefresh should not do anything if maxWait <= 0

1 files changed, 5 insertions, 0 deletions

diff --git a/src/mongo/util/concurrency/thread_pool.h b/src/mongo/util/concurrency/thread_pool.h
index d6ae8a76c54..1d7e35fbf7e 100644
--- a/src/mongo/util/concurrency/thread_pool.h
+++ b/src/mongo/util/concurrency/thread_pool.h
@@ -59,6 +59,11 @@ public:
      * Structure used to configure an instance of ThreadPool.
      */
     struct Options {
+        // Set maxThreads to this if you don't want to limit the number of threads in the pool.
+        // Note: the value used here is high enough that it will never be reached, but low enough
+        // that it won't cause overflows if mixed with signed ints or math.
+        static constexpr size_t kUnlimited = 1'000'000'000;
+
         // Name of the thread pool. If this string is empty, the pool will be assigned a
         // name unique to the current process.
         std::string poolName;