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https://issues.apache.org/jira/browse/HBASE-15709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15599282#comment-15599282
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Duo Zhang commented on HBASE-15709:
-----------------------------------

[~stack] I removed this in TestMobStoreScanne where we write a WAL entry around 
75MB.

{code:title=TestMobStoreScanner.java}
            // TODO: AsyncFSWAL can not handle large edits right now, remove 
this after we fix the issue.               
            TEST_UTIL.getConfiguration().set(WALFactory.WAL_PROVIDER, 
"filesystem");
{code}

It passed locally which means now the AsyncFSWAL can handle entries which size 
is larger than the MAX_PACKET_SIZE limit of HDFS.

> Handle large edits for asynchronous WAL
> ---------------------------------------
>
>                 Key: HBASE-15709
>                 URL: https://issues.apache.org/jira/browse/HBASE-15709
>             Project: HBase
>          Issue Type: Sub-task
>          Components: io, wal
>    Affects Versions: 2.0.0
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>            Priority: Critical
>             Fix For: 2.0.0
>
>         Attachments: HBASE-15709.patch
>
>
> First, FanOutOneBlockAsyncDFSOutput can not work if the buffered data is 
> larger than PacketReceiver.MAX_PACKET_SIZE(16MB).
> Second, since we only allow one block here, we need to make sure we do not 
> exceed the block size after writing a large chunk of data.



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