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https://issues.apache.org/jira/browse/HIVE-13029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15295431#comment-15295431
]
Gopal V commented on HIVE-13029:
--------------------------------
Failed tests have
{code}
Exception: MetaException(message:Got exception:
org.apache.hadoop.hive.metastore.api.MetaException Unable to get databases,
Failed after attempts=36, exceptions:
Fri May 20 07:26:23 PDT 2016, null, java.net.SocketTimeoutException:
callTimeout=60000, callDuration=68259: row 'HBMS_DBS,,99999999999999' on table
'hbase:meta' at region=hbase:meta,,1.1588230740,
hostname=ip-10-233-133-28.us-west-1.compute.internal,59291,1463749169723,
seqNum=0
)
org.apache.hadoop.hive.ql.metadata.HiveException: MetaException(message:Got
exception: org.apache.hadoop.hive.metastore.api.MetaException Unable to get
databases, Failed after attempts=36, exceptions:
Fri May 20 07:26:23 PDT 2016, null, java.net.SocketTimeoutException:
callTimeout=60000, callDuration=68259: row 'HBMS_DBS,,99999999999999' on table
'hbase:meta' at region=hbase:meta,,1.1588230740,
hostname=ip-10-233-133-28.us-west-1.compute.internal,59291,1463749169723,
seqNum=0
)
at
org.apache.hadoop.hive.ql.metadata.Hive.getAllDatabases(Hive.java:1373)
{code}
which looks like a metastore startup issue.
> NVDIMM support for LLAP Cache
> -----------------------------
>
> Key: HIVE-13029
> URL: https://issues.apache.org/jira/browse/HIVE-13029
> Project: Hive
> Issue Type: New Feature
> Components: llap
> Affects Versions: 2.1.0
> Reporter: Gopal V
> Assignee: Gopal V
> Priority: Critical
> Attachments: HIVE-13029.1.patch, HIVE-13029.2.patch,
> HIVE-13029.3.patch
>
>
> LLAP cache has been designed so that the cache can be offloaded easily to a
> pmem API without restart coherence.
> The tricky part about NVDIMMs are restart coherence, while most of the cache
> gains can be obtained without keeping state across refreshes, since LLAP is
> not the system of record, HDFS is.
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