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https://issues.apache.org/jira/browse/AMQ-8011?focusedWorklogId=502858&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-502858
]
ASF GitHub Bot logged work on AMQ-8011:
---------------------------------------
Author: ASF GitHub Bot
Created on: 20/Oct/20 21:31
Start Date: 20/Oct/20 21:31
Worklog Time Spent: 10m
Work Description: alevandoski opened a new pull request #566:
URL: https://github.com/apache/activemq/pull/566
AMQ-8011 - Performance Related issue in
ClassLoadingAwareObjectInputStream.checkSecurity()
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Issue Time Tracking
-------------------
Worklog Id: (was: 502858)
Time Spent: 20m (was: 10m)
> Performance Related issue in
> ClassLoadingAwareObjectInputStream.checkSecurity( )
> --------------------------------------------------------------------------------
>
> Key: AMQ-8011
> URL: https://issues.apache.org/jira/browse/AMQ-8011
> Project: ActiveMQ
> Issue Type: Improvement
> Components: JMS client
> Affects Versions: 5.14.5
> Reporter: Andrew Levandoski
> Priority: Major
> Fix For: 5.17.0, 5.16.1, 5.15.14
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> ClassLoadingAwareObjectInputStream.checkSecurity( ) is inefficient as it's
> repeatedly calling Class.getPackage( ).
> It only needs to be invoked once.
> It doesn't need to be invoked at all if trustAllPackage( ) == true
>
> Class.getPackage( ) calls Package.getPackage( )
> Package.getPackage( ) calls ClassLoader.getPackage(name)
> ClassLoader.getPackage( ) contains a synchronized block (on HashMap) that
> ends up delaying other threads when:
> * The rate of messaging is very high when security is enabled.
> * it's made worse by the number of packages in TRUSTED_PACKAGES
> * also made worse by the ordering of packages in TRUSTED_PACKAGES
> * if the package being compared is further down the list, it exacerbates the
> issue.
> We have seen our code calling clazz.getPackage( ) upwards of 15 times during
> the handling of a single message.
>
>
> StackTrace of delayed threads:
> {code:java}
> "ActiveMQ Session Task-1280" #164931 prio=7 os_prio=0 tid=0x00007f2764002800
> nid=0x522d waiting for monitor entry [0x00007f24c3436000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at java.lang.ClassLoader.getPackage(ClassLoader.java:1611)
> - waiting to lock <0x00000006dd9b39c0> (a java.util.HashMap)
> at java.lang.Package.getPackage(Package.java:334)
> at java.lang.Class.getPackage(Class.java:796)
> at
> org.apache.activemq.util.ClassLoadingAwareObjectInputStream.checkSecurity(ClassLoadingAwareObjectInputStream.java:106)
> at
> org.apache.activemq.util.ClassLoadingAwareObjectInputStream.resolveClass(ClassLoadingAwareObjectInputStream.java:57)
> at
> java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1924)
> at
> java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1807)
> at
> java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1941)
> at
> java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1807)
> at
> java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1941)
> at
> java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1807)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2098)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:464)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
> at java.util.ArrayList.readObject(ArrayList.java:797)
> at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1184)
> at
> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2234)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2125)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
> at
> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2343)
> at
> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2267)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2125)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
> at
> java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2343)
> at
> java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2267)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2125)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:464)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
> at
> org.apache.activemq.command.ActiveMQObjectMessage.getObject(ActiveMQObjectMessage.java:206)
> {code}
>
> StackTrace of the thread holding the lock:
> {noformat}
> "ActiveMQ Session Task-3517" #164719 prio=7 os_prio=0 tid=0x00007f26ac008800
> nid=0x225c waiting for monitor entry [0x00007f26fb41d000]
> java.lang.Thread.State: BLOCKED (on object monitor)
> at java.lang.ClassLoader.getPackage(ClassLoader.java:1611)
> - locked <0x00000006dd9b39c0> (a java.util.HashMap)
> at java.lang.Package.getPackage(Package.java:334)
> at java.lang.Class.getPackage(Class.java:796)
> at
> org.apache.activemq.util.ClassLoadingAwareObjectInputStream.checkSecurity(ClassLoadingAwareObjectInputStream.java:106)
> at
> org.apache.activemq.util.ClassLoadingAwareObjectInputStream.resolveClass(ClassLoadingAwareObjectInputStream.java:57)
> at
> java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1924)
> at
> java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1807)
> at
> java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2098)
> at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1624)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:464)
> at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
> at
> org.apache.activemq.command.ActiveMQObjectMessage.getObject(ActiveMQObjectMessage.java:206){noformat}
>
> The code in 5.16.0 looks the same and probably is subject to the same issue.
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