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https://issues.apache.org/jira/browse/HBASE-15378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15175100#comment-15175100
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Phil Yang commented on HBASE-15378:
-----------------------------------
{quote}
Does the class have to be public ?
{quote}
It seems that this filter will be serialized by protobuf and if I set it to
non-public there will be an exception like this:
{quote}
Caused by: java.lang.IllegalAccessException: Class
org.apache.hadoop.hbase.protobuf.ProtobufUtil can not access a member of class
org.apache.hadoop.hbase.regionserver.TestScannerHeartbeatMessages$SparseFilter
with modifiers "public static"
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:109)
at
java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:261)
{quote}
> Scanner can not handle a heartbeat message with no results
> ----------------------------------------------------------
>
> Key: HBASE-15378
> URL: https://issues.apache.org/jira/browse/HBASE-15378
> Project: HBase
> Issue Type: Bug
> Affects Versions: 1.2.0, 1.1.3
> Reporter: Phil Yang
> Assignee: Phil Yang
> Priority: Critical
> Attachments: HBASE-15378-v1.txt, HBASE-15378-v2.txt
>
>
> When a RS scanner get a TIME_LIMIT_REACHED_MID_ROW state, they will stop
> scanning and send back what it has read to client and mark the message as a
> heartbeat message. If there is no cell has been read, it will be an empty
> response.
> However, ClientScanner only handles the situation that the client gets an
> empty heartbeat and its cache is not empty. If the cache is empty too, it
> will be regarded as end-of-region and open a new scanner for next region.
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