[ https://issues.apache.org/jira/browse/HDFS-9936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lin Yiqun updated HDFS-9936: ---------------------------- Status: Patch Available (was: Open) Attach a simple patch. > Remove unused import in HdfsServerConstants > ------------------------------------------- > > Key: HDFS-9936 > URL: https://issues.apache.org/jira/browse/HDFS-9936 > Project: Hadoop HDFS > Issue Type: Bug > Reporter: Lin Yiqun > Assignee: Lin Yiqun > Priority: Minor > Attachments: HDFS-9936.001.patch > > > In HDFS-9134, it moved the > {{LEASE_SOFTLIMIT_PERIOD}},{{LEASE_HARDLIMIT_PERIOD}} constants from > {{HdfsServerConstants}}. But in its fixed patch, it import a unused import > {{import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys}} in > {{HdfsServerConstants}}. The code As follow: > {code} > --- > a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/HdfsServerConstants.java > +++ > b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/HdfsServerConstants.java > @@ -25,6 +25,7 @@ > > import org.apache.hadoop.classification.InterfaceAudience; > import org.apache.hadoop.hdfs.DFSUtil; > +import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys; > import org.apache.hadoop.hdfs.protocol.HdfsConstants; > import org.apache.hadoop.hdfs.server.datanode.DataNodeLayoutVersion; > import org.apache.hadoop.hdfs.server.namenode.FSDirectory; > @@ -42,28 +43,14 @@ > @InterfaceAudience.Private > public interface HdfsServerConstants { > int MIN_BLOCKS_FOR_WRITE = 1; > + > /** > - * For a HDFS client to write to a file, a lease is granted; During the > lease > - * period, no other client can write to the file. The writing client can > - * periodically renew the lease. When the file is closed, the lease is > - * revoked. The lease duration is bound by this soft limit and a > - * {@link HdfsServerConstants#LEASE_HARDLIMIT_PERIOD hard limit}. Until the > - * soft limit expires, the writer has sole write access to the file. If the > - * soft limit expires and the client fails to close the file or renew the > - * lease, another client can preempt the lease. > - */ > - long LEASE_SOFTLIMIT_PERIOD = 60 * 1000; > - /** > - * For a HDFS client to write to a file, a lease is granted; During the > lease > - * period, no other client can write to the file. The writing client can > - * periodically renew the lease. When the file is closed, the lease is > - * revoked. The lease duration is bound by a > - * {@link HdfsServerConstants#LEASE_SOFTLIMIT_PERIOD soft limit} and this > hard > - * limit. If after the hard limit expires and the client has failed to > renew > - * the lease, HDFS assumes that the client has quit and will automatically > - * close the file on behalf of the writer, and recover the lease. > + * Please see {@link HdfsConstants#LEASE_SOFTLIMIT_PERIOD} and > + * {@link HdfsConstants#LEASE_HARDLIMIT_PERIOD} for more information. > */ > - long LEASE_HARDLIMIT_PERIOD = 60 * LEASE_SOFTLIMIT_PERIOD; > + long LEASE_SOFTLIMIT_PERIOD = HdfsConstants.LEASE_SOFTLIMIT_PERIOD; > + long LEASE_HARDLIMIT_PERIOD = HdfsConstants.LEASE_HARDLIMIT_PERIOD; > + > long LEASE_RECOVER_PERIOD = 10 * 1000; // in ms > {code} > It has already a import for {{HdfsConstants}}. We can remove unused import > here. -- This message was sent by Atlassian JIRA (v6.3.4#6332)