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https://issues.apache.org/jira/browse/HBASE-21915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16772647#comment-16772647
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Hudson commented on HBASE-21915:
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Results for branch branch-2.1
[build #879 on
builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.1/879/]:
(/) *{color:green}+1 overall{color}*
----
details (if available):
(/) {color:green}+1 general checks{color}
-- For more information [see general
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.1/879//General_Nightly_Build_Report/]
(/) {color:green}+1 jdk8 hadoop2 checks{color}
-- For more information [see jdk8 (hadoop2)
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.1/879//JDK8_Nightly_Build_Report_(Hadoop2)/]
(/) {color:green}+1 jdk8 hadoop3 checks{color}
-- For more information [see jdk8 (hadoop3)
report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.1/879//JDK8_Nightly_Build_Report_(Hadoop3)/]
(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(/) {color:green}+1 client integration test{color}
> FileLink$FileLinkInputStream doesn't implement CanUnbuffer
> ----------------------------------------------------------
>
> Key: HBASE-21915
> URL: https://issues.apache.org/jira/browse/HBASE-21915
> Project: HBase
> Issue Type: Bug
> Components: Filesystem Integration
> Reporter: Josh Elser
> Assignee: Josh Elser
> Priority: Major
> Fix For: 3.0.0, 2.2.0, 1.4.10, 2.0.5, 2.3.0, 2.1.4, 1.5.1
>
> Attachments: HBASE-21915.001.patch, HBASE-21915.002.patch
>
>
> FileLinkInputStream is an InputStream which handles the indirection of where
> the real HFile lives. This implementation is wrapped via
> FSDataInputStreamWrapper and is transparent when it's being used by a caller.
> Often, we have an FSDataInputStreamWrapper wrapping a FileLinkInputStream
> which wraps an FSDataInputStream.
> The problem is that FileLinkInputStream does not implement the
> \{{CanUnbuffer}} interface, which means that the underlying
> {{FSDataInputStream}} for the HFile the link refers to doesn't get
> {{unbuffer()}} called on it. This can cause an open Socket to hang around, as
> described in HBASE-9393.
> Both [~wchevreuil] and myself have run into this, each for different users.
> We think the commonality as to why these users saw this (but we haven't run
> into it on our own) is that it requires a very large snapshot to be brought
> into a new system. Big kudos to [~esteban] for his help in diagnosing this as
> well!
> If this analysis is accurate, it would affect all branches.
>
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