Tomcat升级导致AccessLog名称错误
1. 问题描述
Tomcat配置
<Host name="localhost" appBase="webapps"
unpackWARs="false" autoDeploy="false">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="access." suffix=".log"
pattern="%h %l %u %t "%r" %s %b "%{Referer}i" "%{User-Agent}i" " %{X-Forwarded-For}i" resolveHosts="false"/>
</Host>
Tomcat7
access.2018-01-01.log
access.2018-01-02.log
access.2018-01-03.log
...
Tomcat8
access..2018-01-01.log
access..2018-01-02.log
access..2018-01-03.log
...
问题描述： Tomcat8输出的access.log文件名多了一个 .,导致读取日志文件出错
2. 原因分析
Tomcat7和Tomcat8对AccessLogValve的处理中, 对 prefix(文件前缀) 处理不同
Tomcat7: The Access Log Valve supports the following configuration attributes:
| Attribute | Description |
|---|---|
| prefix | The prefix added to the start of each log file's name. If not specified, the default value is "access_log.". |
| suffix | The suffix added to the end of each log file's name. If not specified, the default value is "" (a zero-length string), meaning that no suffix will be added. |
| ... | - |
Tomcat8: The Access Log Valve supports the following configuration attributes:
| Attribute | Description |
|---|---|
| prefix | The prefix added to the start of each log file's name. If not specified, the default value is "access_log". |
| suffix | The suffix added to the end of each log file's name. If not specified, the default value is "" (a zero-length string), meaning that no suffix will be added. |
| ... | - |
3. 解决方案
Tomcat7配置
prefix="access."
<Host name="localhost" appBase="webapps"
unpackWARs="false" autoDeploy="false">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="access." suffix=".log"
pattern="%h %l %u %t "%r" %s %b "%{Referer}i" "%{User-Agent}i" " %{X-Forwarded-For}i" resolveHosts="false"/>
</Host>
Tomcat8配置
prefix="access"
<Host name="localhost" appBase="webapps"
unpackWARs="false" autoDeploy="false">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="access" suffix=".log"
pattern="%h %l %u %t "%r" %s %b "%{Referer}i" "%{User-Agent}i" " %{X-Forwarded-For}i" resolveHosts="false"/>
</Host>