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Thread / Load error. Java process consuming over 75% CPU as of 2AM. Edited

Jonathan Smith Community Leader Jun 29, 2018

On 6/20 we hit our thread max which caused the environment to go down. An Atlassian support rep recommended increasing the max threads to 120. This seemed to be a band-aid because we are approaching max again.

Error in logs:

20-Jun-2018 15:46:30.024 WARNING [ContainerBackgroundProcessor[StandardEngine[Standalone]]] org.apache.catalina.valves.StuckThreadDetectionValve.notifyStuckThreadDetected Thread "http-nio-8090-exec-29" (id=23022) has been active for 185,298 milliseconds (since 6/20/18 3:43 PM) to serve the same request for and may be stuck (configured threshold for this StuckThreadDetectionValve is 60 seconds). There is/are 7 thread(s) in total that are monitored by this Valve and may be stuck. java.lang.Throwable
	at java.lang.Object.wait(Native Method)
	at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(
	at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(
	at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(
	at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(
	at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(

The applied fix: 

1) Open the Confluence.cfg.xml file in the data directory and change the following;

<property name="hibernate.c3p0.max_size">120</property>

2) Open the server.xml file in the installation directory/conf and change the following:



This morning, a Confluence process is currently consuming over 75% of the overall CPU. I am not sure if this is related. We plan to restart the Confluence service at 8PM tonight as long as the CPU stays around 80%. 

Anyone have any other suggestions to resolve high CPU/load/thread issues? If not, I will open another case.


3 answers

1 accepted

0 votes
Answer accepted
Jonathan Smith Community Leader Jul 02, 2018

Restarting the primary confluence service brought the levels back to normal.

0 votes
Jonathan Smith Community Leader Jun 29, 2018

Cores are stressed as well:


hi, we have the same issue and allready have set the values

<property name="hibernate.c3p0.max_size">200</property>
<Connector SSLEnabled="true" acceptCount="100" port="443" clientAuth="false" 
connectionTimeout="20000" disableUploadTimeout="true" enableLookups="false" keyAlias="1"
maxHttpHeaderSize="8192" maxSpareThreads="75" maxThreads="150" minSpareThreads="25"
protocol="org.apache.coyote.http11.Http11Protocol" scheme="https" secure="true"
sslProtocol="TLSv1.2" useBodyEncodingForURI="true" sslEnabledProtocols="TLSv1.2"

 but the cpu load still climb to 99% of the java process...

do you have a idea?

What version of Confluence are you using?  How many users do you have?

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