Tomcat在啟動是提示：
INFO [localhost-startStop-1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
Tomcat啟動時會掃描大量jar包，如果含有不符合TLD規范的就會出現這個問題。
修改Tomcat啟動文件，添加：-Djava.security.egd=file:/dev/./urandom
JAVA_OPTS="$JAVA_OPTS -server -Xms256m -Xmx512m -XX:MetaspaceSize=512M -XX:MaxMetaspaceSize=256M -Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom"
然后重啟Tomcat。