java.lang.IllegalStateException: Connection pool shut down

[fengchenggf]

大佬，生产环境报这个错，不知道是哪出的问题，麻烦帮忙看下吧
java.lang.IllegalStateException: Connection pool shut down
at org.apache.http.util.Asserts.check(Asserts.java:34)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.requestConnection(PoolingHttpClientConnectionManager.java:269)
at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:176)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)
at me.chanjar.weixin.common.util.http.apache.ApacheHttpClientSimpleGetRequestExecutor.execute(ApacheHttpClientSimpleGetRequestExecutor.java:39)
at me.chanjar.weixin.common.util.http.apache.ApacheHttpClientSimpleGetRequestExecutor.execute(ApacheHttpClientSimpleGetRequestExecutor.java:19)
at me.chanjar.weixin.mp.api.impl.BaseWxMpServiceImpl.getOAuth2AccessToken(BaseWxMpServiceImpl.java:172)
at me.chanjar.weixin.mp.api.impl.BaseWxMpServiceImpl.oauth2getAccessToken(BaseWxMpServiceImpl.java:182)