正则表达式以匹配整个Java异常Stacktrace
[英]Regular Expression to Match Entire Java Exception Stacktrace
问题描述
Given a standard log file for a java application: 
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)
What is a regular expression to match the entire stack trace for any java Exception ? 什么是匹配任何java Exception的整个堆栈跟踪的正则表达式？
It's easy enough to match any single line that contains "Exception": 匹配包含“ Exception”的任何一行都非常容易：
grep "Exception" log.txt
But I want all of the subsequent "at" statements as well. 但我也希望所有后续的“ at”语句。 So the result matched string should be: 因此，结果匹配的字符串应为：
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)
Thank you in advance for your consideration and response. 预先感谢您的考虑和回应。
2 个解决方案
解决方案1
3 已采纳 2018-07-12 13:46:52
Using Java +8 you could do: 使用Java +8，您可以执行以下操作：
(?m)^.*?Exception.*(?:\R+^\s*at .*)+
See live demo here 在这里观看现场演示
In grep however, since it processes one line at a time by default, you could match lines with Exception or those starting with at : 但是，在grep中，由于默认情况下每次处理一行，因此您可以将Exception行或以at开头的行进行匹配：
grep -P '(?m)^(?:\S+?Exception|\h+at )' file
解决方案2
1 2018-07-12 15:42:04
Don't use a complicated, non-portable regexp when you can do this trivially using any awk in any shell on any UNIX box: 当您可以在任何UNIX机器上的任何shell中使用任何awk来进行此操作时，请不要使用复杂的，不可移植的正则表达式：
$ 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)
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