Processing malformed PNG by incoming mail handler causes OOM and blocks queue

java.lang.OutOfMemoryError: Java heap space
Dumping heap to java_pid9943.hprof ...
Heap dump file created [295513170 bytes in 1,603 secs]
2014-04-25 17:19:35,812 http-bio-8090-exec-12 ERROR admin 1039x1167x1 1vj4fgc 127.0.0.1 /rest/jira-mail-plugin/1.0/message-handlers/test [common.error.jersey.ThrowableExceptionMapper] Uncaught exception thrown by REST service: Java heap space
java.lang.OutOfMemoryError: Java heap space
	at com.sun.imageio.plugins.png.PNGImageReader.readMetadata(PNGImageReader.java:728)
	at com.sun.imageio.plugins.png.PNGImageReader.getImageMetadata(PNGImageReader.java:1550)
	at com.atlassian.jira.plugins.mail.handlers.GeneratedAttachmentRecogniser.containsJiraMetadata(GeneratedAttachmentRecogniser.java:64)
	at com.atlassian.jira.plugins.mail.handlers.GeneratedAttachmentRecogniser.<init>(GeneratedAttachmentRecogniser.java:32)
	at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler.isJiraGeneratedAttachment(AbstractMessageHandler.java:836)
	at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler.shouldAttach(AbstractMessageHandler.java:779)
	at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler$2.handlePart(AbstractMessageHandler.java:619)
	at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler.handleMultipart(AbstractMessageHandler.java:691)
	at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler.handleMultipart(AbstractMessageHandler.java:683)
	at com.atlassian.jira.plugins.mail.handlers.AbstractMessageHandler.createAttachmentsForMessage(AbstractMessageHandler.java:652)
	at com.atlassian.jira.plugins.mail.handlers.CreateIssueHandler.handleMessage(CreateIssueHandler.java:274)
	at com.atlassian.jira.plugins.mail.handlers.CreateOrCommentHandler.handleMessage(CreateOrCommentHandler.java:133)
	at com.atlassian.jira.service.services.mail.MailFetcherService$1.process(MailFetcherService.java:413)
	at com.atlassian.jira.service.services.mail.MailFetcherService$MessageProviderImpl.getAndProcessMail(MailFetcherService.java:306)
	at com.atlassian.jira.service.services.mail.MailFetcherService.runImpl(MailFetcherService.java:401)
	at com.atlassian.jira.service.services.file.AbstractMessageHandlingService.run(AbstractMessageHandlingService.java:257)
	at com.atlassian.jira.plugins.mail.rest.MessageHandlersResource$1.run(MessageHandlersResource.java:183)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
	at com.atlassian.plugin.util.ContextClassLoaderSwitchingUtil.runInContext(ContextClassLoaderSwitchingUtil.java:57)
	at com.atlassian.plugin.util.ContextClassLoaderSwitchingUtil.runInContext(ContextClassLoaderSwitchingUtil.java:28)
	at com.atlassian.jira.plugins.mail.rest.MessageHandlersResource.testHandler(MessageHandlersResource.java:169)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
	at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)
	at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
	at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)