[JSWSERVER-15360] Kanban board breaks down if attachmentmodule from JIRA - Plugins - View Issue Panels is disabled - Create and track feature requests for Atlassian products.

Type: Bug
Resolution: Low Engagement
Priority: Low (View bug fix roadmap)
Fix Version/s: None
Affects Version/s: 7.2.0, 7.2.6
Component/s: AgileBoard
Labels:
- affects-server
- cleanup-seos-fy25

Introduced in Version:
7.02
Support reference count:
5
Symptom Severity:
Severity 3 - Minor
UIS:
1
Bug Fix Policy:
View Atlassian Server bug fix policy

Summary

Kanban board breaks down if attachmentmodule from JIRA - Plugins - View Issue Panels is disabled

Environment

JIRA 7.2.6
Not reproducible with: JIRA 6.4 and JIRA 7.1.9

Steps to Reproduce

Go to Administration > Add-ons > Manage Add-ons
Select All add-ons
Find the add-on Atlassian *JIRA - Plugins - View Issue Panels and disable module attachmentmodule

Expected Results

Kanban board working noramlly

Actual Results

The below exception is thrown in the atlassian-jira.log file:

2016-12-20 18:43:36,803 ajp-nio-8072-exec-31 ERROR admin 1123x156666x1 27lkta 192.168.10.170 /rest/greenhopper/1.0/xboard/issue/details.json [c.a.g.w.rapid.issue.IssueResource] Unable to complete GreenHopper REST method 
java.lang.IllegalArgumentException: The delegated panel with the complete key ['com.atlassian.jira.jira-view-issue-plugin:attachmentmodule'] must be an instance of WebPanelModuleDescriptor
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.utils.DelegatedWebPanelFinder.toDelegateWebPanel(DelegatedWebPanelFinder.java:56)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.utils.DelegatedWebPanelFinder.lambda$findDelegatedPanels$2(DelegatedWebPanelFinder.java:42)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.utils.DelegatedWebPanelFinder$$Lambda$4074/1535202189.apply(Unknown Source)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.utils.DelegatedWebPanelFinder.findDelegatedPanels(DelegatedWebPanelFinder.java:45)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.getDelegatedPanel(BaseEditableTabEntryFactory.java:250)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.buildSectionForDelegatePanel(BaseEditableTabEntryFactory.java:230)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.buildSection(BaseEditableTabEntryFactory.java:201)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.lambda$buildSections$43(BaseEditableTabEntryFactory.java:147)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory$$Lambda$4068/1299245163.apply(Unknown Source)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.buildSections(BaseEditableTabEntryFactory.java:149)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.createEntry(BaseEditableTabEntryFactory.java:79)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.EditableTabModelFactory.lambda$buildTabs$39(EditableTabModelFactory.java:69)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.EditableTabModelFactory$$Lambda$4060/753019383.apply(Unknown Source)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.EditableTabModelFactory.buildTabs(EditableTabModelFactory.java:70)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.EditableTabModelFactory.createModel(EditableTabModelFactory.java:52)
	at com.atlassian.greenhopper.web.rapid.issue.IssueEntryFactory.buildViewEntry(IssueEntryFactory.java:378)
	at com.atlassian.greenhopper.web.rapid.issue.IssueResource$1.call(IssueResource.java:159)
	at com.atlassian.greenhopper.web.rapid.issue.IssueResource$1.call(IssueResource.java:129)
	at com.atlassian.greenhopper.web.util.RestCall.response(RestCall.java:42)
	at com.atlassian.greenhopper.web.AbstractResource.createResponse(AbstractResource.java:111)
	at com.atlassian.greenhopper.web.AbstractResource.response(AbstractResource.java:91)
	at com.atlassian.greenhopper.web.rapid.issue.IssueResource.getPageData(IssueResource.java:128)
	... 2 filtered
	at java.lang.reflect.Method.invoke(Method.java:483)
	... 19 filtered
	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:154)
	... 1 filtered
	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:68)
	... 33 filtered
	at com.atlassian.servicedesk.internal.web.OperationalStatusAwareHttpFilter.doFilter(OperationalStatusAwareHttpFilter.java:31)
	... 8 filtered
	at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
	... 53 filtered
	at com.atlassian.jira.security.JiraSecurityFilter.lambda$doFilter$0(JiraSecurityFilter.java:76)
	at com.atlassian.jira.security.JiraSecurityFilter$$Lambda$859/1010089394.doFilter(Unknown Source)
	... 1 filtered
	at com.atlassian.jira.security.JiraSecurityFilter.doFilter(JiraSecurityFilter.java:74)
	... 16 filtered
	at com.atlassian.plugins.rest.module.servlet.RestSeraphFilter.doFilter(RestSeraphFilter.java:37)
	... 20 filtered
	at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)
	... 5 filtered
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.lambda$invokeFilterChain$0(CustomerContextSettingFilter.java:181)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter$$Lambda$5677/963497961.call(Unknown Source)
	at com.atlassian.servicedesk.internal.utils.context.ReentrantThreadLocalBasedCodeContext.rteInvoke(ReentrantThreadLocalBasedCodeContext.java:142)
	at com.atlassian.servicedesk.internal.utils.context.ReentrantThreadLocalBasedCodeContext.runOutOfContext(ReentrantThreadLocalBasedCodeContext.java:94)
	at com.atlassian.servicedesk.internal.utils.context.CustomerContextServiceImpl.runOutOfCustomerContext(CustomerContextServiceImpl.java:64)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.outOfCustomerContext(CustomerContextSettingFilter.java:174)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.doFilterImpl(CustomerContextSettingFilter.java:130)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.doFilter(CustomerContextSettingFilter.java:121)
	... 4 filtered
	at com.atlassian.jwt.internal.servlet.JwtAuthFilter.doFilter(JwtAuthFilter.java:32)
	... 8 filtered
	at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
	... 4 filtered
	at com.atlassian.web.servlet.plugin.LocationCleanerFilter.doFilter(LocationCleanerFilter.java:36)
	... 29 filtered
	at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)
	... 27 filtered
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)
2016-12-20 18:43:36,805 ajp-nio-8072-exec-31 ERROR admin 1123x156666x1 27lkta 192.168.10.170 /rest/greenhopper/1.0/xboard/issue/details.json [c.a.p.r.c.error.jersey.ThrowableExceptionMapper] Uncaught exception thrown by REST service: The delegated panel with the complete key ['com.atlassian.jira.jira-view-issue-plugin:attachmentmodule'] must be an instance of WebPanelModuleDescriptor
java.lang.IllegalArgumentException: The delegated panel with the complete key ['com.atlassian.jira.jira-view-issue-plugin:attachmentmodule'] must be an instance of WebPanelModuleDescriptor
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.utils.DelegatedWebPanelFinder.toDelegateWebPanel(DelegatedWebPanelFinder.java:56)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.utils.DelegatedWebPanelFinder.lambda$findDelegatedPanels$2(DelegatedWebPanelFinder.java:42)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.utils.DelegatedWebPanelFinder$$Lambda$4074/1535202189.apply(Unknown Source)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.utils.DelegatedWebPanelFinder.findDelegatedPanels(DelegatedWebPanelFinder.java:45)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.getDelegatedPanel(BaseEditableTabEntryFactory.java:250)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.buildSectionForDelegatePanel(BaseEditableTabEntryFactory.java:230)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.buildSection(BaseEditableTabEntryFactory.java:201)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.lambda$buildSections$43(BaseEditableTabEntryFactory.java:147)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory$$Lambda$4068/1299245163.apply(Unknown Source)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.buildSections(BaseEditableTabEntryFactory.java:149)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.editable.factory.BaseEditableTabEntryFactory.createEntry(BaseEditableTabEntryFactory.java:79)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.EditableTabModelFactory.lambda$buildTabs$39(EditableTabModelFactory.java:69)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.EditableTabModelFactory$$Lambda$4060/753019383.apply(Unknown Source)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.EditableTabModelFactory.buildTabs(EditableTabModelFactory.java:70)
	at com.atlassian.greenhopper.web.rapid.issue.tabs.EditableTabModelFactory.createModel(EditableTabModelFactory.java:52)
	at com.atlassian.greenhopper.web.rapid.issue.IssueEntryFactory.buildViewEntry(IssueEntryFactory.java:378)
	at com.atlassian.greenhopper.web.rapid.issue.IssueResource$1.call(IssueResource.java:159)
	at com.atlassian.greenhopper.web.rapid.issue.IssueResource$1.call(IssueResource.java:129)
	at com.atlassian.greenhopper.web.util.RestCall.response(RestCall.java:42)
	at com.atlassian.greenhopper.web.AbstractResource.createResponse(AbstractResource.java:111)
	at com.atlassian.greenhopper.web.AbstractResource.response(AbstractResource.java:91)
	at com.atlassian.greenhopper.web.rapid.issue.IssueResource.getPageData(IssueResource.java:128)
	... 2 filtered
	at java.lang.reflect.Method.invoke(Method.java:483)
	... 19 filtered
	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:154)
	... 1 filtered
	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:68)
	... 33 filtered
	at com.atlassian.servicedesk.internal.web.OperationalStatusAwareHttpFilter.doFilter(OperationalStatusAwareHttpFilter.java:31)
	... 8 filtered
	at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
	... 53 filtered
	at com.atlassian.jira.security.JiraSecurityFilter.lambda$doFilter$0(JiraSecurityFilter.java:76)
	at com.atlassian.jira.security.JiraSecurityFilter$$Lambda$859/1010089394.doFilter(Unknown Source)
	... 1 filtered
	at com.atlassian.jira.security.JiraSecurityFilter.doFilter(JiraSecurityFilter.java:74)
	... 16 filtered
	at com.atlassian.plugins.rest.module.servlet.RestSeraphFilter.doFilter(RestSeraphFilter.java:37)
	... 20 filtered
	at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)
	... 5 filtered
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.lambda$invokeFilterChain$0(CustomerContextSettingFilter.java:181)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter$$Lambda$5677/963497961.call(Unknown Source)
	at com.atlassian.servicedesk.internal.utils.context.ReentrantThreadLocalBasedCodeContext.rteInvoke(ReentrantThreadLocalBasedCodeContext.java:142)
	at com.atlassian.servicedesk.internal.utils.context.ReentrantThreadLocalBasedCodeContext.runOutOfContext(ReentrantThreadLocalBasedCodeContext.java:94)
	at com.atlassian.servicedesk.internal.utils.context.CustomerContextServiceImpl.runOutOfCustomerContext(CustomerContextServiceImpl.java:64)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.outOfCustomerContext(CustomerContextSettingFilter.java:174)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.doFilterImpl(CustomerContextSettingFilter.java:130)
	at com.atlassian.servicedesk.internal.web.CustomerContextSettingFilter.doFilter(CustomerContextSettingFilter.java:121)
	... 4 filtered
	at com.atlassian.jwt.internal.servlet.JwtAuthFilter.doFilter(JwtAuthFilter.java:32)
	... 8 filtered
	at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
	... 4 filtered
	at com.atlassian.web.servlet.plugin.LocationCleanerFilter.doFilter(LocationCleanerFilter.java:36)
	... 29 filtered
	at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)
	... 27 filtered
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)

Workaround

Go to Administration > Add-ons > Manage Add-ons
Select All add-ons
Find the add-on Atlassian *JIRA - Plugins - View Issue Panels and enable module attachmentmodule

- - Sort By Name
  - Sort By Date
  - Ascending
  - Descending
  - Thumbnails
  - List

error_msg.png
174 kB
20/Dec/2016 9:05 PM

Form Name

Aakrity Tibrewal added a comment - 10/Apr/2025 10:34 AM

Atlassian Update - 10 April 2025

Hi,

At Atlassian, our goal is to ensure we’re providing the best experience for our customers. With our new Data Center strategy, Atlassian's focus is on security, compliance, and performance and is a key driver in prioritizing bugs. Closing the bugs that do not fall into those categories will allow us to focus on the ones in the most current versions of our products.

This bug is being closed due to a lack of engagement in the last four years, including no new watchers, votes, or comments; this inactivity suggests a low impact.

Please note the comments on this thread are not being monitored.

You can read more about our bug fix policy here and how we prioritize bugs.

To learn more about our recent investments in Jira Data Center, please check our public roadmap and dashboards containing recently resolved issues, current work, and future plans.

Kind regards,
Jira Data Center

Aakrity Tibrewal added a comment - 10/Apr/2025 10:34 AM Atlassian Update - 10 April 2025 Hi, At Atlassian, our goal is to ensure we’re providing the best experience for our customers. With our new Data Center strategy, Atlassian's focus is on security, compliance, and performance and is a key driver in prioritizing bugs. Closing the bugs that do not fall into those categories will allow us to focus on the ones in the most current versions of our products. This bug is being closed due to a lack of engagement in the last four years , including no new watchers, votes, or comments; this inactivity suggests a low impact. Please note the comments on this thread are not being monitored. You can read more about our bug fix policy here and how we prioritize bugs. To learn more about our recent investments in Jira Data Center, please check our public roadmap and dashboards containing recently resolved issues , current work, and future plans . Kind regards, Jira Data Center

mgm Atlassian-Experts added a comment - 24/Jan/2019 8:41 AM

any updates here? We need also a solution!

Thank you

mgm Atlassian-Experts added a comment - 24/Jan/2019 8:41 AM any updates here? We need also a solution! Thank you

Dang Thi Thuy Tien added a comment - 24/Jan/2019 7:52 AM - edited

We got the same problem when we try to disable linkingmodule

In version 7.13.0

Thanks

Dang Thi Thuy Tien added a comment - 24/Jan/2019 7:52 AM - edited We got the same problem when we try to disable linkingmodule In version 7.13.0 Thanks

Michel Marcoux added a comment - 07/Jun/2018 6:18 PM - edited

any updates on this?

Thanks!

Michel Marcoux
Ubisoft Entertainment

Michel Marcoux added a comment - 07/Jun/2018 6:18 PM - edited any updates on this? Thanks! Michel Marcoux Ubisoft Entertainment

Details

Description

Summary

Environment

Steps to Reproduce

Expected Results

Actual Results

Workaround

Attachments

Attachments

Forms

Activity

[JSWSERVER-15360] Kanban board breaks down if attachmentmodule from JIRA - Plugins - View Issue Panels is disabled

Collapse comment: Aakrity Tibrewal added a comment - 10/Apr/2025 10:34 AM

Expand comment: Aakrity Tibrewal added a comment - 10/Apr/2025 10:34 AM

Collapse comment: mgm Atlassian-Experts added a comment - 24/Jan/2019 8:41 AM

Expand comment: mgm Atlassian-Experts added a comment - 24/Jan/2019 8:41 AM

Collapse comment: Dang Thi Thuy Tien added a comment - 24/Jan/2019 7:52 AM, Edited by Dang Thi Thuy Tien - 24/Jan/2019 8:06 AM

Expand comment: Dang Thi Thuy Tien added a comment - 24/Jan/2019 7:52 AM, Edited by Dang Thi Thuy Tien - 24/Jan/2019 8:06 AM

Collapse comment: Michel Marcoux added a comment - 07/Jun/2018 6:18 PM, Edited by Michel Marcoux - 07/Jun/2018 8:05 PM

Expand comment: Michel Marcoux added a comment - 07/Jun/2018 6:18 PM, Edited by Michel Marcoux - 07/Jun/2018 8:05 PM

People

Dates

Backbone Issue Sync