java exception while adding a mockup

I added two mockups to a page successfully. On adding the third mockup i keep getting this issue below. I tried three times. I have the xml with me after the first time so i havent lost the image. but i dont know why this issue is coming all of a sudden

CONFLUENCE
System Error
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Cause:
java.lang.RuntimeException: java.io.IOException: No such file or directory
at com.atlassian.confluence.pages.persistence.dao.FileSystemAttachmentDataDao.saveDataForAttachment(FileSystemAttachmentDataDao.java:151)
caused by: java.io.IOException: No such file or directory
at java.io.UnixFileSystem.createFileExclusively(Native Method)

Stack Trace: [hide]

java.lang.RuntimeException: java.io.IOException: No such file or directory
at com.atlassian.confluence.pages.persistence.dao.FileSystemAttachmentDataDao.saveDataForAttachment(FileSystemAttachmentDataDao.java:151)
at com.atlassian.confluence.pages.persistence.dao.FileSystemAttachmentDataDao.saveDataForAttachment(FileSystemAttachmentDataDao.java:108)
at com.atlassian.confluence.pages.persistence.dao.hibernate.AbstractHibernateAttachmentDao.saveNewAttachment(AbstractHibernateAttachmentDao.java:189)
at com.atlassian.confluence.pages.DefaultAttachmentManager.saveNewAttachment(DefaultAttachmentManager.java:53)
at com.atlassian.confluence.pages.AbstractAttachmentManager.saveAttachment(AbstractAttachmentManager.java:84)
at com.atlassian.confluence.pages.DelegatorAttachmentManager.saveAttachment(DelegatorAttachmentManager.java:98)
at sun.reflect.GeneratedMethodAccessor1418.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:296)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:177)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:107)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:166)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy11.saveAttachment(Unknown Source)
at com.balsamiq.confluence.plugins.mockups.MockupsServlet.service(MockupsServlet.java:231)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at com.atlassian.plugin.descriptors.servlet.ServletModuleContainerServlet.service(ServletModuleContainerServlet.java:38)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.confluence.util.LoggingContextFilter.doFilter(LoggingContextFilter.java:49)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:192)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.seraph.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:114)
at com.atlassian.confluence.util.AbstractBootstrapHotSwappingFilter.doFilter(AbstractBootstrapHotSwappingFilter.java:28)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.seraph.filter.BaseLoginFilter.doFilter(BaseLoginFilter.java:110)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.confluence.util.ClusterHeaderFilter.doFilter(ClusterHeaderFilter.java:35)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.johnson.filters.AbstractJohnsonFilter.doFilter(AbstractJohnsonFilter.java:72)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.springframework.orm.hibernate.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:170)
at com.atlassian.spring.filter.FlushingSpringSessionInViewFilter.doFilterInternal(FlushingSpringSessionInViewFilter.java:29)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:142)
at com.atlassian.core.filters.ProfilingAndErrorFilter.doFilter(ProfilingAndErrorFilter.java:27)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.confluence.core.datetime.RequestTimeThreadLocalFilter.doFilter(RequestTimeThreadLocalFilter.java:34)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.confluence.util.RequestCacheThreadLocalFilter.doFilter(RequestCacheThreadLocalFilter.java:25)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.gzipfilter.GzipFilter.doFilterInternal(GzipFilter.java:94)
at com.atlassian.gzipfilter.GzipFilter.doFilter(GzipFilter.java:64)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.atlassian.core.filters.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:33)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:542)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.IOException: No such file or directory
at java.io.UnixFileSystem.createFileExclusively(Native Method)
at java.io.File.createNewFile(File.java:850)
at com.atlassian.core.util.FileUtils.copyFile(FileUtils.java:444)
at com.atlassian.confluence.pages.persistence.dao.FileSystemAttachmentDataDao.saveDataForAttachment(FileSystemAttachmentDataDao.java:144)
... 75 more

Referer URL: http://c/plugins/servlet/mockups?do=a...

Build Information:
buildNumber: 1318
upTime: 1 day, 10 hours, 31 minutes, 3 seconds
devMode: false
version: 2.8.0
home: /data/confluence/confluence_home

Unique ID: 0x0000011B5AA994F3C0A8007A78FE89741A5889A77FE81B9AC16A82663EA0ABF1

Server Information:
Application Server: Apache Tomcat/5.5.23
Servlet Version: 2.4
Database Dialect: com.atlassian.hibernate.dialect.MySQLDialect
Database Driver Name: com.mysql.jdbc.Driver
Database Driver Version: 5.0
Database Name: MySQL
Database Version: 4.1.22-log
Database Transaction Isolation: Repeatable read Database Latency: 0

Memory Information:
Total Memory: 9934 MB
Used Memory: 6845 MB
Free Memory: 3088 MB

System Information:
userName: root
favouriteColour: Myrtle
time: 20:10:18
javaVm: Java HotSpot(TM) 64-Bit Server VM
operatingSystemArchitecture: amd64
date: Friday, 25 Jul 2008
operatingSystem: Linux 2.6.18-53.1.14.el5
jvmVersion: 1.0
userTimezone: Asia/Calcutta
fileSystemEncoding: UTF-8
jvmImplementationVersion: 1.5.0_14-b03
appServer: Apache Tomcat
javaVendor: Sun Microsystems Inc.
javaVersion: 1.5.0_14
javaRuntime: Java(TM) 2 Runtime Environment, Standard Edition
jvmVendor: Sun Microsystems Inc.

Cluster Information:
Not clustered.

Enabled Plugins:
Content Action Menu Sections (confluence.content.action.menu, Version: 1.0)
Plugin Information (com.atlassian.confluence.ext.plugininfo, Version: 0.3)
Default Theme (com.atlassian.confluence.themes.default, Version: 1.0)
Linking Plugin (net.customware.confluence.plugin.linking, Version: 2.3.3)
Basic Macros (confluence.macros.basic, Version: 1.3)
Confluence Macro Exec (de.aluepke.confluence.macro.exec, Version: 0.1)
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User Listener (confluence.extra.userlister, Version: 2.3)
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Confluence Usage Stats (com.atlassian.confluence.ext.usage, Version: 0.7.3-SNAPSHOT)
Chart Plugin (confluence.extra.chart, Version: 1.9.1)
Information Macros (confluence.extra.information, Version: 1.0)
Global Labels Sections (confluence.sections.labels, Version: 1.0)
Composition Plugin (net.customware.confluence.plugin.composition, Version: 2.3)
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Request

Information:
URL: http://c/500page.jsp
- Scheme: http
- Server: c
- Port: 80
- URI: /500page.jsp
- - Context Path:
- - Servlet Path: /500page.jsp
- - Path Info:
- - Query String:
foofoo

Attributes:
- javax.servlet.forward.request_uri : /plugins/servlet/mockups
- javax.servlet.forward.context_path :
- javax.servlet.forward.servlet_path : /plugins/servlet
- javax.servlet.forward.path_info : /500page.jsp
- javax.servlet.error.message :
- javax.servlet.error.exception : java.lang.RuntimeException: java.io.IOException: No such file or directory
- os_securityfilter_already_filtered : true
- com.atlassian.johnson.filters.JohnsonFilter_already_filtered : true
- javax.servlet.error.request_uri : /plugins/servlet/mockups
- com.atlassian.gzipfilter.GzipFilter_already_filtered : true
- javax.servlet.error.status_code : 500
- javax.servlet.error.servlet_name : servlet-module-container-servlet
- atlassian.core.seraph.original.url : /plugins/servlet/mockups
- loginfilter.already.filtered : true
- Confluence-Request-Time : 1216996818596
- sessioninview.FILTERED : true

Parameters:
- mockup = multiperson chat view
- page = 104170682
- do = save
- png = <snip>
iVBORw0KGgoAAAANSUhEUgAAAqsAAAGzCAYAAAAIdl6aAACZ2UlEQVR42uydBVRUa/vo
xml = <mockup> <controls> <control> <controlproperties> <selectedindex>0</selectedindex> <text>Chat%2CMail%2CContacts</text> </controlproperties> </control> <control> <controlproperties> <selectedindex>3</selectedindex> <text>Roster%2C%28o%29Bhavin%20Tu..%2C%28f%29Ninad%20Ra..%2C%28o%29Jinesh%20%28o%29Vaibhav%20%28o%29Prite..%2CGame%20Room</text> </controlproperties> </control> <control> <controlproperties> <text>Pritesh</text> </controlproperties> </control> <control> </control><control> <control> <controlproperties> <text>Call%2CSend%20File</text> </controlproperties> </control> </control><control> <control> <controlproperties> <text>Send</text> </controlproperties> </control> <control> <controlproperties> <text>Type%20name%20to%20invite</text> </controlproperties> </control> <control> <controlproperties> <text>7%3A05p%20%5BJinesh%5D%20i%20eat%20therefore%20i%20am</text> </controlproperties> </control> <control> <controlproperties> <text>7%3A06p%20%5BVaibhav%5D%20i%20am%20therefore%20i%20eat</text> </controlproperties> </control> </control><control> </control><control> <control> <controlproperties> <text>Jinesh</text> </controlproperties> </control> <control> <controlproperties> <text>Vaibhav</text> </controlproperties> </control> </control></controls> </mockup>
Confluence User:
- anonymous

Logging:
0 log statements generated by this request.
</snip>