ConcurrentModificationException in PropertiesConfigurationLayout
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Key: CONFIGURATION-278
URL: https://issues.apache.org/jira/browse/CONFIGURATION-278
Project: Commons Configuration
Issue Type: Bug
Affects Versions: 1.4
Reporter: Emmanuel Bourg
Fix For: 1.5
PropertiesConfigurationLayout is not thread safe, if a configuration event is
received when the configuration is being saved, a
ConcurrentModificationException is thrown :
java.util.ConcurrentModificationException
at
org.apache.commons.collections.map.AbstractLinkedMap$LinkIterator.nextEntry(AbstractLinkedMap.java:555)
at
org.apache.commons.collections.map.AbstractLinkedMap$KeySetIterator.next(AbstractLinkedMap.java:455)
at
org.apache.commons.configuration.PropertiesConfigurationLayout.save(PropertiesConfigurationLayout.java:455)
at
org.apache.commons.configuration.PropertiesConfiguration.save(PropertiesConfiguration.java:410)
at
org.apache.commons.configuration.AbstractFileConfiguration.save(AbstractFileConfiguration.java:517)
at
org.apache.commons.configuration.AbstractFileConfiguration.save(AbstractFileConfiguration.java:484)
at
org.apache.commons.configuration.AbstractFileConfiguration.save(AbstractFileConfiguration.java:451)
at
org.apache.commons.configuration.AbstractFileConfiguration.save(AbstractFileConfiguration.java:425)
at
org.apache.commons.configuration.AbstractFileConfiguration.save(AbstractFileConfiguration.java:373)
at
org.apache.commons.configuration.AbstractFileConfiguration.possiblySave(AbstractFileConfiguration.java:725)
at
org.apache.commons.configuration.AbstractFileConfiguration.clearProperty(AbstractFileConfiguration.java:764)
at
org.apache.commons.configuration.DataConfiguration.clearProperty(DataConfiguration.java:109)
at
org.apache.commons.configuration.AbstractConfiguration.setProperty(AbstractConfiguration.java:483)
This happens easily in a multi threaded application using a central
configuration with auto saved enabled.
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