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https://issues.apache.org/jira/browse/HDFS-6999?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yang Jiandan updated HDFS-6999:
-------------------------------
Description:
In our cluster, we found hbase handler may be never return when it reads hdfs
file using RemoteBlockReader2, and the hander thread occupys 100% cup. wo found
this is because PacketReceiver#readChannelFully is in an infinite loop. the
following while never break.
while (buf.remaining() > 0) {
int n = ch.read(buf);
if (n < 0) {
throw new IOException("Premature EOF reading from " + ch);
}
}
was:
In our cluster, we found hbase handler may be never return when it reads hdfs
file using RemoteBlockReader2, and the hander thread occupys 100% cup. wo found
this is because PacketReceiver#readChannelFully is in an infinite loop. the
following while never break.
while (buf.remaining() > 0) {
int n = ch.read(buf);
if (n < 0) {
throw new IOException("Premature EOF reading from " + ch);
}
}
> PacketReceiver#readChannelFully is in an infinite loop
> ------------------------------------------------------
>
> Key: HDFS-6999
> URL: https://issues.apache.org/jira/browse/HDFS-6999
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode, hdfs-client
> Affects Versions: 2.4.1
> Reporter: Yang Jiandan
> Priority: Critical
>
> In our cluster, we found hbase handler may be never return when it reads hdfs
> file using RemoteBlockReader2, and the hander thread occupys 100% cup. wo
> found this is because PacketReceiver#readChannelFully is in an infinite loop.
> the following while never break.
> while (buf.remaining() > 0) {
> int n = ch.read(buf);
> if (n < 0) {
> throw new IOException("Premature EOF reading from " + ch);
> }
> }
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