Merge pull request #3356 from wangyu096/issue_3355

fix: 使用 spring 定时任务，线程池配置不合理导致定时任务阻塞 #3355

src/backend/job-backup/service-job-backup/src/main/java/com/tencent/bk/job/backup/config/SpringScheduleConfig.java

@@ -0,0 +1,20 @@
+package com.tencent.bk.job.backup.config;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.SchedulingConfigurer;
+import org.springframework.scheduling.config.ScheduledTaskRegistrar;
+
+import java.util.concurrent.ScheduledThreadPoolExecutor;
+
+@Configuration
+@Slf4j
+public class SpringScheduleConfig implements SchedulingConfigurer {
+    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
+        log.info("Configure spring cron task scheduler");
+        //设定一个长度5的定时任务线程池
+        taskRegistrar.setScheduler(new ScheduledThreadPoolExecutor(5, (r, executor) -> log.error(
+            "ScheduledThreadPoolExecutor rejected a runnable")));
+    }
+
+}