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https://issues.apache.org/jira/browse/HDFS-13347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16423511#comment-16423511
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Xiao Chen commented on HDFS-13347:
----------------------------------
Thanks all for the work here. This seems to have broken branch-2 compilation
though:
{noformat}
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on
project hadoop-hdfs-rbf: Compilation failure: Compilation failure:
[ERROR]
hadoop/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/metrics/NamenodeBeanMetrics.java:[34,26]
package java.util.function does not exist
[ERROR]
hadoop/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/metrics/NamenodeBeanMetrics.java:[35,24]
package java.util.stream does not exist
{noformat}
> RBF: Cache datanode reports
> ---------------------------
>
> Key: HDFS-13347
> URL: https://issues.apache.org/jira/browse/HDFS-13347
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: 3.0.0
> Reporter: Íñigo Goiri
> Assignee: Íñigo Goiri
> Priority: Minor
> Fix For: 3.1.0, 2.10.0, 2.9.1, 3.0.2
>
> Attachments: HDFS-13347-branch-2.000.patch, HDFS-13347.000.patch,
> HDFS-13347.001.patch, HDFS-13347.002.patch, HDFS-13347.003.patch,
> HDFS-13347.004.patch, HDFS-13347.005.patch, HDFS-13347.006.patch
>
>
> Getting the datanode reports is an expensive operation and can be executed
> very frequently by the UI and watchdogs. We should cache this information.
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