报错内容如下：
log4j:WARN No appenders could be found for logger (freemarker.cache).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
16:41:21.933 logback [xxl-job, admin JobTriggerPoolHelper-fastTriggerPool-1123358701] ERROR c.x.job.core.util.XxlJobRemotingUtil - Connection refused: no further information
java.net.ConnectException: Connection refused: no further information
at java.base/sun.nio.ch.Net.pollConnect(Native Method)
at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:669)
at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:549)
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:597)
at java.base/java.net.Socket.connect(Socket.java:645)
at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:177)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:497)
at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:600)
at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:246)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:351)
at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:372)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1299)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1232)
at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1120)
at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1051)
at com.xxl.job.core.util.XxlJobRemotingUtil.postBody(XxlJobRemotingUtil.java:99)
at com.xxl.job.core.biz.client.ExecutorBizClient.run(ExecutorBizClient.java:43)
at com.xxl.job.admin.core.trigger.XxlJobTrigger.runExecutor(XxlJobTrigger.java:211)
at com.xxl.job.admin.core.trigger.XxlJobTrigger.processTrigger(XxlJobTrigger.java:164)
at com.xxl.job.admin.core.trigger.XxlJobTrigger.trigger(XxlJobTrigger.java:89)
at com.xxl.job.admin.core.thread.JobTriggerPoolHelper$3.run(JobTriggerPoolHelper.java:95)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
at java.base/java.lang.Thread.run(Thread.java:831)
16:41:27.421 logback [xxl-job, admin JobFailMonitorHelper] ERROR c.x.j.a.c.alarm.impl.EmailJobAlarm - >>>>>>>>>>> xxl-job, job fail alarm email send error, JobLogId:28
org.springframework.mail.MailAuthenticationException: Authentication failed; nested exception is javax.mail.AuthenticationFailedException: failed to connect, no password specified?
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:440)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:361)
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:356)
at com.xxl.job.admin.core.alarm.impl.EmailJobAlarm.doAlarm(EmailJobAlarm.java:74)
at com.xxl.job.admin.core.alarm.JobAlarmer.alarm(JobAlarmer.java:52)
at com.xxl.job.admin.core.thread.JobFailMonitorHelper$1.run(JobFailMonitorHelper.java:64)
at java.base/java.lang.Thread.run(Thread.java:831)
Caused by: javax.mail.AuthenticationFailedException: failed to connect, no password specified?
at javax.mail.Service.connect(Service.java:376)
at org.springframework.mail.javamail.JavaMailSenderImpl.connectTransport(JavaMailSenderImpl.java:518)
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:437)
... 6 common frames omitted
请问有谁知道吗？
