连接池的连接数统计问题

如题，实际连接数也就十几个，但connections里面显示得过于多了，与实际情况不符。详见下图：



Start by reproducing the connection-pool statistics discrepancy described in the issue and compare the displayed connections count with the actual connection count shown in the screenshots. Trace the connection-count reporting entry point and identify why the two values diverge; done means the reported count matches the actual connections and the behavior is covered by a regression test.

Written by the indexing model from the issue text.