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From "Abhinandan Prateek (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CLOUDSTACK-9586) When using shared storage with Xenserver prepareTemplate does not work
Date Thu, 10 Nov 2016 06:24:58 GMT
Abhinandan Prateek created CLOUDSTACK-9586:
----------------------------------------------

             Summary: When using shared storage with Xenserver prepareTemplate does not work
                 Key: CLOUDSTACK-9586
                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9586
             Project: CloudStack
          Issue Type: Bug
      Security Level: Public (Anyone can view this level - this is the default.)
            Reporter: Abhinandan Prateek



2016-11-09 15:05:15,876 DEBUG [c.c.h.x.r.XenServerStorageProcessor] (DirectAgent-29:ctx-8d890b55)
Failed to destroy pbd
SR_BACKEND_FAILURE_40The SR scan failed  [opterr=['INTERNAL_ERROR', 'Db_exn.Uniqueness_constraint_violation("VDI",
"uuid", "703f59ca-6e5e-38d3-bbef-707b5b14c704")']]
	at com.xensource.xenapi.Types.checkResponse(Types.java:2021)
	at com.xensource.xenapi.Connection.dispatch(Connection.java:395)
	at com.cloud.hypervisor.xenserver.resource.XenServerConnectionPool$XenServerConnection.dispatch(XenServerConnectionPool.java:462)
	at com.xensource.xenapi.SR.scan(SR.java:1257)
	at com.cloud.hypervisor.xenserver.resource.Xenserver625StorageProcessor.createFileSR(Xenserver625StorageProcessor.java:113)
	at com.cloud.hypervisor.xenserver.resource.Xenserver625StorageProcessor.createFileSr(Xenserver625StorageProcessor.java:139)
	at com.cloud.hypervisor.xenserver.resource.Xenserver625StorageProcessor.copyTemplateToPrimaryStorage(Xenserver625StorageProcessor.java:173)

Root Cause: CloudPlatform creates a SR on each host, which points to the template location
on the secondary storage (secondary_Storage/template/tmpl/<account_id>/<template_id>).
This causes the database unique constraint violation when each XenServer tries to scan the
SR created on each host. The host that scans the SR last, throws the exception because VDI
was recognized already from the SR scan of the first host.



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