我想只记录这一行，如果写logstash规则

2018-03-14 22:23:56,833 ERROR [FrontShopController.java:45] : ==dianchou.app.boss.pageController.FrontShopControl
lerjava.lang.NullPointerException
      at dianchou.app.boss.pageController.FrontShopController.projectDetail(FrontShopController.java:40)
      at sun.reflect.GeneratedMethodAccessor495.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:606)
      at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)

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