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https://issues.apache.org/jira/browse/YARN-2944?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Trezzo updated YARN-2944:
-------------------------------
    Attachment: YARN-2944-trunk-v1.patch

Attached is v1 trunk patch.

> SCMStore/InMemorySCMStore is not currently compatible with 
> ReflectionUtils#newInstance
> --------------------------------------------------------------------------------------
>
>                 Key: YARN-2944
>                 URL: https://issues.apache.org/jira/browse/YARN-2944
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Chris Trezzo
>            Assignee: Chris Trezzo
>            Priority: Minor
>         Attachments: YARN-2944-trunk-v1.patch
>
>
> Currently the Shared Cache Manager uses ReflectionUtils#newInstance to create 
> the SCMStore service. Unfortunately the SCMStore class does not have a 
> 0-argument constructor.
> On startup, the SCM fails with the following:
> {noformat}
> 14/12/09 16:10:53 INFO service.AbstractService: Service SharedCacheManager 
> failed in state INITED; cause: java.lang.RuntimeException: 
> java.lang.NoSuchMethodException: 
> org.apache.hadoop.yarn.server.sharedcachemanager.store.InMemorySCMStore.<init>()
> java.lang.RuntimeException: java.lang.NoSuchMethodException: 
> org.apache.hadoop.yarn.server.sharedcachemanager.store.InMemorySCMStore.<init>()
>         at 
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:131)
>         at 
> org.apache.hadoop.yarn.server.sharedcachemanager.SharedCacheManager.createSCMStoreService(SharedCacheManager.java:103)
>         at 
> org.apache.hadoop.yarn.server.sharedcachemanager.SharedCacheManager.serviceInit(SharedCacheManager.java:65)
>         at 
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
>         at 
> org.apache.hadoop.yarn.server.sharedcachemanager.SharedCacheManager.main(SharedCacheManager.java:156)
> Caused by: java.lang.NoSuchMethodException: 
> org.apache.hadoop.yarn.server.sharedcachemanager.store.InMemorySCMStore.<init>()
>         at java.lang.Class.getConstructor0(Class.java:2763)
>         at java.lang.Class.getDeclaredConstructor(Class.java:2021)
>         at 
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:125)
>         ... 4 more
> 14/12/09 16:10:53 FATAL sharedcachemanager.SharedCacheManager: Error starting 
> SharedCacheManager
> java.lang.RuntimeException: java.lang.NoSuchMethodException: 
> org.apache.hadoop.yarn.server.sharedcachemanager.store.InMemorySCMStore.<init>()
>         at 
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:131)
>         at 
> org.apache.hadoop.yarn.server.sharedcachemanager.SharedCacheManager.createSCMStoreService(SharedCacheManager.java:103)
>         at 
> org.apache.hadoop.yarn.server.sharedcachemanager.SharedCacheManager.serviceInit(SharedCacheManager.java:65)
>         at 
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:163)
>         at 
> org.apache.hadoop.yarn.server.sharedcachemanager.SharedCacheManager.main(SharedCacheManager.java:156)
> Caused by: java.lang.NoSuchMethodException: 
> org.apache.hadoop.yarn.server.sharedcachemanager.store.InMemorySCMStore.<init>()
>         at java.lang.Class.getConstructor0(Class.java:2763)
>         at java.lang.Class.getDeclaredConstructor(Class.java:2021)
>         at 
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:125)
>         ... 4 more
> {noformat}
> This JIRA is to add a 0-argument constructor to SCMStore.



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