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https://issues.apache.org/jira/browse/POOL-393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shichao Yuan updated POOL-393:
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Summary: BaseGenericObjectPool.jmxRegister may cost too much time (was:
BaseGenericObjectPool.jmxRegister may cost too much time when creating many
pools)
> BaseGenericObjectPool.jmxRegister may cost too much time
> --------------------------------------------------------
>
> Key: POOL-393
> URL: https://issues.apache.org/jira/browse/POOL-393
> Project: Commons Pool
> Issue Type: Improvement
> Affects Versions: 2.4.2
> Reporter: Shichao Yuan
> Priority: Major
>
>
> When creating may pools, I find that it tasks too much time to register jmx.
> In the code, the ObjectName's postfix always starts with 1, so many
> InstanceAlreadyExistsExceptions may be thrown before registered successfully.
> Maybe a random number is a better choice, or a atomic long.
>
> {color:#cc7832}private {color}ObjectName
> {color:#ffc66d}jmxRegister{color}(BaseObjectPoolConfig
> config{color:#cc7832},{color} String jmxNameBase{color:#cc7832},
> {color}String jmxNamePrefix) {
> ObjectName objectName = {color:#cc7832}null;{color} MBeanServer mbs =
> ManagementFactory.getPlatformMBeanServer(){color:#cc7832};{color}{color:#cc7832}
> int {color}i = {color:#6897bb}1{color}{color:#cc7832};{color}{color:#cc7832}
> boolean {color}registered = {color:#cc7832}false;{color} String base =
> config.getJmxNameBase(){color:#cc7832};{color}{color:#cc7832} if {color}(base
> == {color:#cc7832}null{color}) {
> base = jmxNameBase{color:#cc7832};{color} }
> {color:#cc7832}while {color}(!registered) {
> {color:#cc7832}try {color}{
> ObjectName objName{color:#cc7832};{color} {color:#808080}// Skip the numeric
> suffix for the first pool in case there is{color}{color:#808080} // only one
> so the names are cleaner.{color} {color:#cc7832}if {color}(i ==
> {color:#6897bb}1{color}) {
> objName = {color:#cc7832}new {color}ObjectName(base +
> jmxNamePrefix){color:#cc7832};{color} } {color:#cc7832}else {color}{
> objName = {color:#cc7832}new {color}ObjectName(base + jmxNamePrefix +
> i){color:#cc7832};{color} }
> mbs.registerMBean({color:#cc7832}this,
> {color}objName){color:#cc7832};{color} objectName =
> objName{color:#cc7832};{color} registered = {color:#cc7832}true;{color} }
> {color:#cc7832}catch {color}(MalformedObjectNameException e) {
> {color:#cc7832}if
> {color}(BaseObjectPoolConfig.{color:#9876aa}DEFAULT_JMX_NAME_PREFIX{color}.equals(
> jmxNamePrefix) && jmxNameBase.equals(base)) {
> {color:#808080}// Shouldn't happen. Skip registration if it does.{color}
> registered = {color:#cc7832}true;{color} } {color:#cc7832}else {color}{
> {color:#808080}// Must be an invalid name. Use the defaults instead.{color}
> jmxNamePrefix =
>
> BaseObjectPoolConfig.{color:#9876aa}DEFAULT_JMX_NAME_PREFIX{color}{color:#cc7832};{color}
> base = jmxNameBase{color:#cc7832};{color} }
> } {color:#cc7832}catch {color}(InstanceAlreadyExistsException e) {
> {color:#808080}// Increment the index and try again{color}
> i++{color:#cc7832};{color} } {color:#cc7832}catch
> {color}(MBeanRegistrationException e) {
> {color:#808080}// Shouldn't happen. Skip registration if it does.{color}
> registered = {color:#cc7832}true;{color} } {color:#cc7832}catch
> {color}(NotCompliantMBeanException e) {
> {color:#808080}// Shouldn't happen. Skip registration if it does.{color}
> registered = {color:#cc7832}true;{color} }
> }
> {color:#cc7832}return {color}objectName{color:#cc7832};{color}}
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