Confluence becomes unresponsive when using Viewtracker plugin
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
Problem
Confluence becomes unresponsive and sees spikes in CPU usage.
The following appears in the catalina.out log"
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15-Dec-2017 01:38:05.706 WARNING [ContainerBackgroundProcessor[StandardEngine[Standalone]]] org.apache.catalina.valves.StuckThreadDetectionValve.notifyStuckThreadDetected Thread "http-nio-8444-exec-17" (id=205) has been active for 63,519 milliseconds (since 12/14/17 11:27 AM) to serve the same request for https://confluence.com/confluence/display/AB/page+title and may be stuck (configured threshold for this StuckThreadDetectionValve is 60 seconds). There is/are 2 thread(s) in total that are monitored by this Valve and may be stuck.
java.lang.Throwable
at java.util.regex.Pattern$Curly.match0(Pattern.java:4274)
at java.util.regex.Pattern$Curly.match(Pattern.java:4236)
at java.util.regex.Pattern$Curly.match0(Pattern.java:4281)
at java.util.regex.Pattern$Curly.match(Pattern.java:4236)
at java.util.regex.Pattern$Slice.match(Pattern.java:3974)
at java.util.regex.Pattern$Curly.match0(Pattern.java:4274)
at java.util.regex.Pattern$Curly.match(Pattern.java:4236)
at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3800)
at java.util.regex.Pattern$Start.match(Pattern.java:3463)
at java.util.regex.Matcher.search(Matcher.java:1248)
at java.util.regex.Matcher.find(Matcher.java:637)
at ch.bitvoodoo.confluence.plugins.viewtracker.util.Utils.containsTrackingMacro(Utils.java:61)Environment
Versions 5.1.1 or5.1.2 of the plugin is installed
Diagnostic Steps
Create 6 external thread dumps each spaced 10 seconds apart: Generating a Thread Dump Externally
Look for this long running thread:
1 2 3 4 5 6 7 8 9 10 11 12 13 14"http-nio-8444-exec-3" #191 daemon prio=5 os_prio=0 tid=0x00007fc67905b000 nid=0x2e24 runnable [0x00007fc601714000] java.lang.Thread.State: RUNNABLE at java.util.regex.Pattern$Curly.match0(Pattern.java:4274) at java.util.regex.Pattern$Curly.match(Pattern.java:4236) at java.util.regex.Pattern$Curly.match0(Pattern.java:4281) at java.util.regex.Pattern$Curly.match(Pattern.java:4236) at java.util.regex.Pattern$Slice.match(Pattern.java:3974) at java.util.regex.Pattern$Curly.match0(Pattern.java:4274) at java.util.regex.Pattern$Curly.match(Pattern.java:4236) at java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3800) at java.util.regex.Pattern$Start.match(Pattern.java:3463) at java.util.regex.Matcher.search(Matcher.java:1248) at java.util.regex.Matcher.find(Matcher.java:637) at ch.bitvoodoo.confluence.plugins.viewtracker.util.Utils.containsTrackingMacro(Utils.java:61)Or you can try disabling the plugin and monitor the application to see if the issue is resolved
Cause
This is caused by a bug in the plugin: VIEWTRACKER-171.
Resolution
Uninstall the plugin and install an earlier version, or upgrade past the fix version when the bugfix is released.
Was this helpful?