Could not create connection to database server. Attempted reconnect 3 times. Giving up.

Could not create connection to database server. Attempted reconnect 3 times. Giving up.

一、异常信息

java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect3times. Giving up.

java.lang.NullPointerException at com.hmall.item.es.DocTest.testAddDocument(DocTest.java:44)at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.base/java.lang.reflect.Method.invoke(Method.java:566)at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)at

com.alibaba.nacos.api.exception.NacosException: Request nacos server failed:

二、解决办法