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https://issues.apache.org/jira/browse/YARN-2944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14247244#comment-14247244
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Karthik Kambatla commented on YARN-2944:
----------------------------------------
IIUC, we want to make sure that every implementation of SCMStore has a no-arg
constructor. Is it possible to add a parametrized test-case for this?
> 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, YARN-2944-trunk-v2.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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