• java输出关键参数

import java.security.Security
import request;
import log

String inetAddr = Security.getProperty("sun.net.inetaddr.ttl");
log.info("sun.net.inetaddr.ttl = " + inetAddr);
String cacheTtl = Security.getProperty("networkaddress.cache.ttl");
log.info("networkaddress.cache.ttl = " + cacheTtl);
String negativeTtl = Security.getProperty("networkaddress.cache.negative.ttl");
log.info("networkaddress.cache.negative.ttl = " + negativeTtl);

• jvm, java.security 添加参数

networkaddress.cache.ttl = 30
networkaddress.cache.negative.ttl = 0

• java启动时直接补充参数

jib docker的环境变量

<jvmFlag>-Dnetworkaddress.cache.ttl=30</jvmFlag>
<jvmFlag>-Dnetworkaddress.cache.negative.ttl=0</jvmFlag>

---