SEVERE [DataReaderFactory]: Failed to recognize file format. about gcviewer

[ecki]

What JVM has produced thenGClog, what command line settings did you use and can you attach a small sample file?

[adrixtacy]

Hi Ecki

This is from Jira. Here is the JVM used :

-Xlog:gc*:file=/mycloud/apps/jira/prod/logs/atlassian-jira-gc-%t.log:time,uptime:filecount=5,filesize=20M -XX:+UseG1GC -XX:+ExplicitGCInvokesConcurrent

Java version :
11.0.7
AdoptOpenJDK

I've also attached a sample GC log
atlassian-jira-gc-2020-06-29_10-31-04.log

[adrixtacy]

Here is another Jira instance i have locally with this JVM arguments :

<JVM-Input-Arguments>--add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED -Djava.util.logging.config.file=/Users/adrianstephen/jira/atlassian-jira-software-8.5.4-standalone/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms384m -Xmx2048m -XX:InitialCodeCacheSize=32m -XX:ReservedCodeCacheSize=512m -Djava.awt.headless=true -Datlassian.standalone=JIRA -Dorg.apache.jasper.runtime.BodyContentImpl.LIMIT_BUFFER=true -Dmail.mime.decodeparameters=true -Dorg.dom4j.factory=com.atlassian.core.xml.InterningDocumentFactory -XX:-OmitStackTraceInFastThrow -Djava.locale.providers=COMPAT -Djira.home=/Users/adrianstephen/jira-home/atlassian-jira-software-8.5.4 -Datlassian.plugins.startup.options= -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Xlog:gc*:file=/Users/adrianstephen/jira/atlassian-jira-software-8.5.4-standalone/logs/atlassian-jira-gc-%t.log:time,uptime:filecount=5,filesize=20M -XX:+ExplicitGCInvokesConcurrent -Dignore.endorsed.dirs= -Dcatalina.base=/Users/adrianstephen/jira/atlassian-jira-software-8.5.4-standalone -Dcatalina.home=/Users/adrianstephen/jira/atlassian-jira-software-8.5.4-standalone -Djava.io.tmpdir=/Users/adrianstephen/jira/atlassian-jira-software-8.5.4-standalone/temp</JVM-Input-Arguments>

and sample GC file :
atlassian-jira-gc-2020-08-07_18-15-45.log

<java.version>11.0.8</java.version>
<java.vendor.version>AdoptOpenJDK</java.vendor.version>

[chewiebug]

Hi @adrixtacy

GCViewer relies for performance and complexity reasons on the presence of the "tags" and "level" information in the java unified logs generated by JDK 11 VMs (https://openjdk.java.net/jeps/158). Your logs are missing both (this part of the configuration:
-Xlog:gc*:file=/<path-to-file>:time,uptime:...).

The readme gives examples of configurations, which GCViewer at this time is able to process:

• -Xlog:gc:file="path-to-file" (uses defaults)
• -Xlog:gc=info:file="path-to-file":tags,uptime,level (minimum configuration needed)
• -Xlog:gc*=trace:file="path-to-file":tags,time,uptime,level (maximum configuration supported, additional tags ok, but ignored; additional decorations will break parsing)

If you just add "tags" and "level" to your configuration, GCViewer should be able to parse your log files.

Best regards,
Jörg

PS: The "Contents" you omitted from your initial description of the error was the crucial part of the error message :-).

[adrixtacy]

Thank you so much Jörg ! I can confirm it works now after adding "tags" and "level"

I have raised a bug in Atlassian's issue tracker here : https://jira.atlassian.com/browse/JRASERVER-71420