log-viewer and a default logback FILE_LOG_PATTERN

[ellogi]

We want to add log-viewer to our project but face an issue with a default logback FILE_LOG_PATTERN, that included in spring-boot (it is located here \org\springframework\boot\logging\logback\defaults.xml)
FILE_LOG_PATTERN has below value with wEx param at the end

<property name="FILE_LOG_PATTERN" value="${FILE_LOG_PATTERN:-%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}} ${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] %-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>

And because of wEx param in the pattern we are getting an error when we try to start our application

Caused by: java.lang.UnsupportedOperationException: log encoder pattern contains unsupported terms [pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %5p 11968 --- [%t] %-40.40logger{39} : %m%n%wEx", term=KeyWord(wEx,null)]
	at com.logviewer.logLibs.logback.LogbackLogFormat.createNode(LogbackLogFormat.java:139)
	at com.logviewer.logLibs.logback.LogbackLogFormat.parseLayout(LogbackLogFormat.java:50)
	at com.logviewer.formats.AbstractPatternLogFormat.getDelegate(AbstractPatternLogFormat.java:71)
	at com.logviewer.formats.AbstractPatternLogFormat.getFields(AbstractPatternLogFormat.java:64)
	at com.logviewer.logLibs.logback.LogbackConfigImporter.processAppender(LogbackConfigImporter.java:50)
	at com.logviewer.logLibs.logback.LogbackConfigImporter.get(LogbackConfigImporter.java:82)
	at com.logviewer.logLibs.logback.LogbackConfigImporter.get(LogbackConfigImporter.java:22)

Should we check this param in LogbackLogFormat#createNode method? And is there any solutions to fix this issue other than changing default FILE_LOG_PATTERN?
Thank you

[sevdokimov]

%wEx is provided by Spring-Boot, but LogViewer uses the pure Logback to parse the pattern. That's why the error occurs. I'll add support of %wEx in the next version.

Do you embed LogViewer into your spring-boot application? I can provide a workaround.

[ellogi]

Do you embed LogViewer into your spring-boot application?

Yes. I have managed to add LogViewer in our app by overriding the default spring-boot logback config in logback.xml and removing %wEx param from FILE_LOG_PATTERN. It works but it would be nice if you provide your option of the workaround.

I would also like to say that there are some issues with parsing some first log records. It shows as one big record. Can we do something to fix it?

[sevdokimov]

Could you attach the piece of the log that is detected incorrectly? And the logback pattern. You can send it to my email: sergey.evdokimov85@gmail.com . I need to reproduce it locally.

[ellogi]

I have sent you an email with that info. Thanks

[sevdokimov]

@ellogi ,
Fixed. "wEx" is supported in 0.1.6. Incorrect parsing is fixed too.