fix: WxMpServiceImpl中用ThreadLocal记录重试次数，这个是有问题的，因为在多线程（线程池）环境下ThreadLocal是不会被清0的

weixin-java-mp/src/test/java/me/chanjar/weixin/mp/api/WxMpBusyRetryTest.java

@@ -0,0 +1,66 @@
+package me.chanjar.weixin.mp.api;
+
+import me.chanjar.weixin.common.bean.result.WxError;
+import me.chanjar.weixin.common.exception.WxErrorException;
+import me.chanjar.weixin.common.util.http.RequestExecutor;
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+@Test
+public class WxMpBusyRetryTest {
+
+  @DataProvider(name="getService")
+  public Object[][] getService() {
+    WxMpService service = new WxMpServiceImpl() {
+
+      @Override
+      protected <T, E> T executeInternal(RequestExecutor<T, E> executor, String uri, E data) throws WxErrorException {
+        WxError error = new WxError();
+        error.setErrorCode(-1);
+        throw new WxErrorException(error);
+      }
+    };
+
+    service.setMaxRetryTimes(3);
+    service.setRetrySleepMillis(500);
+    return new Object[][] {
+        new Object[] { service }
+    };
+  }
+
+  @Test(dataProvider = "getService", expectedExceptions = RuntimeException.class)
+  public void testRetry(WxMpService service) throws WxErrorException {
+    service.execute(null, null, null);
+  }
+
+  @Test(dataProvider = "getService")
+  public void testRetryInThreadPool(final WxMpService service) throws InterruptedException, ExecutionException {
+    // 当线程池中的线程复用的时候，还是能保证相同的重试次数
+    ExecutorService executorService = Executors.newFixedThreadPool(1);
+    Runnable runnable = new Runnable() {
+      @Override
+      public void run() {
+        try {
+          System.out.println("=====================");
+          System.out.println(Thread.currentThread().getName() + ": testRetry");
+          service.execute(null, null, null);
+        } catch (WxErrorException e) {
+          throw new RuntimeException(e);
+        } catch (RuntimeException e) {
+          // OK
+        }
+      }
+    };
+    Future<?> submit1 = executorService.submit(runnable);
+    Future<?> submit2 = executorService.submit(runnable);
+
+    submit1.get();
+    submit2.get();
+  }
+
+}

weixin-java-mp/src/test/resources/testng.xml

@@ -3,6 +3,7 @@
 <suite name="Weixin-java-tool-suite" verbose="1">
 	<test name="API_Test">
 		<classes>
+      <class name="me.chanjar.weixin.mp.api.WxMpBusyRetryTest" />
 			<class name="me.chanjar.weixin.mp.api.WxMpBaseAPITest" />
 			<class name="me.chanjar.weixin.mp.api.WxMpCustomMessageAPITest" />
 			<class name="me.chanjar.weixin.mp.api.WxMpMenuAPITest" />