Nyílt Forráskód Techblog: ActiveMQ on Ubuntu 14.04 x64 VPS - Solve OutOfMemoryError, Could not reserve enough space for object heap

You need some tweaks to run ActiveMQ in a resource-constrained VPS environment, I've tried this on a VPS that had 2GB RAM.

0. Download ActiveMQ, extract to /opt/activemq and run:

./activemq setup

1. Tweak JAVA minimum heap memory and max heap size - run and also put this line to ~/.bashrc :

export JAVA_OPTS="-Xms128m -Xmx512m"

Verify settings:

echo $JAVA_OPTS
-Xms128m -Xmx512m

echo $_JAVA_OPTIONS

(empty)

2. Limit resource usage (memoryUsage -> 32MB):
nano conf/activemq.xml

<systemUsage>
<systemUsage>
<memoryUsage>
<memoryUsage limit="32 mb"/>
</memoryUsage>
<storeUsage>
<storeUsage limit="10 gb"/>
</storeUsage>
<tempUsage>
<tempUsage limit="10 gb"/>
</tempUsage>
</systemUsage>
</systemUsage>

3. Comment out a few transport Connectors

<transportConnectors>

<transportConnector name="openwire" uri="tcp://0.0.0.0:61616?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/>


</transportConnectors>

4. Set ACTIVEMQ_OPTS_MEMORY and ACTIVEMQ_OPTS

nano /etc/default/activemq

# Set jvm memory configuration
if [ -z "$ACTIVEMQ_OPTS_MEMORY" ] ; then
ACTIVEMQ_OPTS_MEMORY="-Xms128M -Xmx512M"
fi

# Uncomment to enable audit logging
#ACTIVEMQ_OPTS="$ACTIVEMQ_OPTS -Dorg.apache.activemq.audit=true"
ACTIVEMQ_OPTS="$ACTIVEMQ_OPTS -Dorg.apache.activemq.UseDedicatedTaskRunner=false"

5. Setting up proper passwords:

/opt/activemq/conf# nano jetty-realm.properties

# username: password [,rolename ...]

Error messages on a VPS with 2GB RAM before tweaks:

INFO: Loading '/etc/default/activemq'
INFO: Using java '/usr/bin/java'
Error occurred during initialization of VM
Could not reserve enough space for object heap
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

opt/activemq/bin/activemq console
INFO: Loading '/etc/default/activemq'
INFO: Using java '/usr/bin/java'
INFO: Starting in foreground, this is just for debugging purposes (stop process by pressing CTRL+C)
Error occurred during initialization of VM
java.lang.OutOfMemoryError: unable to create new native thread
at java.lang.Thread.start0(Native Method)
at java.lang.Thread.start(Thread.java:714)
at java.lang.ref.Finalizer.<clinit>(Finalizer.java:226)

./activemq: 453: ./activemq: Cannot fork

ERROR: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.apache.activemq.xbean.XBeanBrokerService#0' defined in class path resource [activemq.xml]: Invocation of init method failed; nested exception is java.lang.OutOfMemoryError: unable to create new native thread
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.apache.activemq.xbean.XBeanBrokerService#0' defined in class path resource [activemq.xml]: Invocation of init method failed; nested exception is java.lang.OutOfMemoryError: unable to create new native thread

Environment details:

ulimit -a

core file size (blocks, -c) unlimited

data seg size (kbytes, -d) unlimited

scheduling priority (-e) 0

file size (blocks, -f) unlimited

pending signals (-i) 127259

max locked memory (kbytes, -l) 64

max memory size (kbytes, -m) unlimited

open files (-n) 1024

pipe size (512 bytes, -p) 8

POSIX message queues (bytes, -q) 819200

real-time priority (-r) 0

stack size (kbytes, -s) 10240

cpu time (seconds, -t) unlimited

max user processes (-u) 127259

virtual memory (kbytes, -v) unlimited

file locks (-x) unlimited

Nyílt Forráskód Techblog

2014. november 14., péntek

ActiveMQ on Ubuntu 14.04 x64 VPS - Solve OutOfMemoryError, Could not reserve enough space for object heap

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