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正则表达式匹配整个Java异常堆栈跟踪

grep logging regex java

Ramón J Romero y Vigil · 技术社区 · 8 年前

给定Java应用程序的标准日志文件:

 INFO [main] (AutoMain.java:133) - querying data 1
DEBUG [main] (AutoMain.java:142) - data 1 count: 23180
 INFO [main] (AutoMain.java:151) - querying data 2
ERROR [main] (AutoMain.java:607) - Failure in auto
java.net.ConnectException: Connection refused (Connection refused)
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at java.net.Socket.connect(Socket.java:538)
    at java.net.Socket.<init>(Socket.java:434)
    at java.net.Socket.<init>(Socket.java:211)
    at com.myCompany.client.ClientIOFactory$1.<init>(ClientIOFactory.java:17)
    at com.myCompany.client.ClientIOFactory.lambda$clientIOFactoryFromSocket$0(ClientIOFactory.java:15)
    at com.myCompany.client.queryData(Client.java:83)
    at com.myCompany.client.queryData(Client.java:91)
    at com.myCompany.queryOptData(InstantAutomaton.java:153)
    at com.myCompany.AutoMain.main(InstantAutomaton.java:426)

什么是正则表达式,以匹配任何Java的整个堆栈跟踪 Exception ?

很容易匹配任何包含“exception”的单行:

grep "Exception" log.txt

但我也想要所有随后的“at”语句。所以匹配的结果字符串应该是:

java.net.ConnectException: Connection refused (Connection refused)
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at java.net.Socket.connect(Socket.java:538)
    at java.net.Socket.<init>(Socket.java:434)
    at java.net.Socket.<init>(Socket.java:211)
    at com.myCompany.client.ClientIOFactory$1.<init>(ClientIOFactory.java:17)
    at com.myCompany.client.ClientIOFactory.lambda$clientIOFactoryFromSocket$0(ClientIOFactory.java:15)
    at com.myCompany.client.queryData(Client.java:83)
    at com.myCompany.client.queryData(Client.java:91)
    at com.myCompany.queryOptData(InstantAutomaton.java:153)
    at com.myCompany.AutoMain.main(InstantAutomaton.java:426)

提前感谢您的考虑和回应。

2 回复 | 直到 8 年前

revo shanwije 8 年前

使用Java + 8,你可以做到:

(?m)^.*?Exception.*(?:\R+^\s*at .*)+

见 live demo here

然而,在grep中,由于默认情况下它一次处理一行,因此可以将行与 Exception 或者那些以 at :

grep -P '(?m)^(?:\S+?Exception|\h+at )' file

Ed Morton 8 年前

不要使用复杂的、不可移植的regexp,当您可以在任何UNIX机器上的任何shell中使用任何awk时:

$ awk '/^[^ ]/{f=0} /Exception/{f=1} f' file
java.net.ConnectException: Connection refused (Connection refused)
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at java.net.Socket.connect(Socket.java:538)
    at java.net.Socket.<init>(Socket.java:434)
    at java.net.Socket.<init>(Socket.java:211)
    at com.myCompany.client.ClientIOFactory$1.<init>(ClientIOFactory.java:17)
    at com.myCompany.client.ClientIOFactory.lambda$clientIOFactoryFromSocket$0(ClientIOFactory.java:15)
    at com.myCompany.client.queryData(Client.java:83)
    at com.myCompany.client.queryData(Client.java:91)
    at com.myCompany.queryOptData(InstantAutomaton.java:153)
    at com.myCompany.AutoMain.main(InstantAutomaton.java:426)