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HDFS-11757. Query StreamCapabilities when creating balancer's lock file. Contributed by SammiChen.

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This commit is contained in:
Andrew Wang 2017-05-11 14:09:44 -07:00
parent 90cb5b4635
commit 83dd14aa84
1 changed files with 5 additions and 2 deletions
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7
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/NameNodeConnector.java
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@ -41,6 +41,7 @@
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FsServerDefaults;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.StreamCapabilities.StreamCapability;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.NameNodeProxies;
import org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException;
@ -250,8 +251,10 @@ private OutputStream checkAndMarkRunning() throws IOException {
.setFlags(EnumSet.of(CreateFlag.CREATE))
.build();
Preconditions.checkState(!fs.getFileStatus(idPath).isErasureCoded(),
"Id File should be a replicate file");
Preconditions.checkState(
fsout.hasCapability(StreamCapability.HFLUSH.getValue())
&& fsout.hasCapability(StreamCapability.HSYNC.getValue()),
"Id lock file should support hflush and hsync");
// mark balancer idPath to be deleted during filesystem closure
fs.deleteOnExit(idPath);