chuxiao created KYLIN-4190:
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Summary: hiveproducer send data excetpion because hive mertics
table location path prefix is different with defaut fs when hdfs uses
router-based federation
Key: KYLIN-4190
URL: https://issues.apache.org/jira/browse/KYLIN-4190
Project: Kylin
Issue Type: Bug
Components: Metrics
Affects Versions: v3.0.0-alpha
Reporter: chuxiao
Our hdfs cluster uses router-based
federation（https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs-rbf/HDFSRouterFederation.html).
Opening the system cube configuration, hiveproducer write() function throw
excetpion :
{code:java}
//代码占位符
ERROR [metrics-blocking-reservoir-scheduler-0] hive.HiveReservoirReporter:119 :
Wrong FS:
hdfs://DClusterNmg4/user/kylin/hive/hive_metrics_job_exception_qa/kday_date=2019-09-04,
expected: hdfs://difed
java.lang.IllegalArgumentException: Wrong FS:
hdfs://DClusterNmg4/user/kylin/hive/hive_metrics_job_exception_qa/kday_date=2019-09-04,
expected: hdfs://difed
at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:717)
at
org.apache.hadoop.hdfs.DistributedFileSystem.getPathName(DistributedFileSystem.java:197)
at
org.apache.hadoop.hdfs.DistributedFileSystem.access$000(DistributedFileSystem.java:109)
at
org.apache.hadoop.hdfs.DistributedFileSystem$23.doCall(DistributedFileSystem.java:1390)
at
org.apache.hadoop.hdfs.DistributedFileSystem$23.doCall(DistributedFileSystem.java:1386)
at
org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at
org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:1402)
at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1494)
at
org.apache.kylin.metrics.lib.impl.hive.HiveProducer.write(HiveProducer.java:137)
at
org.apache.kylin.metrics.lib.impl.hive.HiveProducer.send(HiveProducer.java:122)
at
org.apache.kylin.metrics.lib.impl.hive.HiveReservoirReporter$HiveReservoirListener.onRecordUpdate(HiveReservoirReporter.java:117)
at
org.apache.kylin.metrics.lib.impl.BlockingReservoir.notifyListenerOfUpdatedRecord(BlockingReservoir.java:105)
at
org.apache.kylin.metrics.lib.impl.BlockingReservoir.onRecordUpdate(BlockingReservoir.java:93)
at
org.apache.kylin.metrics.lib.impl.BlockingReservoir.access$300(BlockingReservoir.java:33)
at
org.apache.kylin.metrics.lib.impl.BlockingReservoir$ReporterRunnable.run(BlockingReservoir.java:152)
at java.lang.Thread.run(Thread.java:745)
{code}
This is because the default router namespace is hdfs://difed, and the actual
federation namespaces are the hdfs://DClusterNmg4, the hdfs://DClusterNmg1, and
the hdfs://DClusterNmg2...
So fs.defaultFS in core-sie.xml is hdfs ://difed, But this hive table location
path is hdfs://DClusterNmg4/user/... . Then defaultFs.exists(hiveLocationPath)
throw exception.
So we need to check if the prefix is same. If defaut fs is not a prefix of
hive table location path, use location path get a new filesystem
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