Details
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Bug
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Status: Open
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Major
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Resolution: Unresolved
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3.3.1
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None
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None
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hadoop:3.3.1
Description
We use hdfs federation mode: ns1, ns2. The table data is written under dc-hdfs. But we designate a specific library under a specific ns according to the business division.
Use parquetWriter to write data to the staging temporary file directory of each table under a specific ns, but when the Writer is closed, an exception will be reported, which will trigger our operation to restore the file lease, but when the file is found to be restoring the lease An exception will be reported:
It looks like dn and nn have temporarily lost communication, and this doesn't happen with every write.
java.lang.IllegalArgumentException: java.net.UnknownHostException: ns1hdfs at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:445) at org.apache.hadoop.hdfs.NameNodeProxiesClient.createProxyWithClientProtocol(NameNodeProxiesClient.java:140) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:357) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:291) at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:181) at com.onething.dc.flink.parquet.sink.template.ProcessParquetSinkTemplate.recoverLease(ProcessParquetSinkTemplate.java:180) at com.onething.dc.flink.parquet.sink.template.ProcessParquetSinkTemplate.close(ProcessParquetSinkTemplate.java:208) at com.onething.dc.flink.parquet.sink.ProcessParquetSink$1.processElement(ProcessParquetSink.java:118) at com.onething.dc.flink.parquet.sink.ProcessParquetSink$1.processElement(ProcessParquetSink.java:35) at org.apache.flink.streaming.api.operators.ProcessOperator.processElement(ProcessOperator.java:66) at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:205) at org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.processElement(AbstractStreamTaskNetworkInput.java:134) at org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.emitNext(AbstractStreamTaskNetworkInput.java:105) at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:66) at org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:419) at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:204) at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:661) at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:623) at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:776) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:563) at java.lang.Thread.run(Thread.java:748) Suppressed: java.lang.IllegalArgumentException: java.net.UnknownHostException: ns1hdfs at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:445) at org.apache.hadoop.hdfs.NameNodeProxiesClient.createProxyWithClientProtocol(NameNodeProxiesClient.java:140) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:357) at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:291) at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:181) at com.onething.dc.flink.parquet.sink.template.ProcessParquetSinkTemplate.recoverLease(ProcessParquetSinkTemplate.java:180) at com.onething.dc.flink.parquet.sink.template.ProcessParquetSinkTemplate.close(ProcessParquetSinkTemplate.java:208) at org.apache.flink.api.common.functions.util.FunctionUtils.closeFunction(FunctionUtils.java:41) at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.dispose(AbstractUdfStreamOperator.java:117) at org.apache.flink.streaming.runtime.tasks.StreamTask.disposeAllOperators(StreamTask.java:837) at org.apache.flink.streaming.runtime.tasks.StreamTask.runAndSuppressThrowable(StreamTask.java:816) at org.apache.flink.streaming.runtime.tasks.StreamTask.cleanUpInvoke(StreamTask.java:733) at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:637) ... 3 more Caused by: java.net.UnknownHostException: ns1hdfs ... 16 more Caused by: java.net.UnknownHostException: ns1hdfs ... 21 more
I can't see what the problem is, but when I checked the log of the namenode, I found that the block status of the file could not change from COMMITTED to COMPLETE. The reason is that dn needs to report ibr to namenode when closing the file. And it will close after receiving ack confirmation. However, dn failed to report ibr, which made it impossible to close the file. And it will retry every time the report fails, and the waiting time of the client is doubled in turn: 400ms, 800ms, 1600ms, 3200ms, 6400ms. These retries can be seen in the log of the namenode.
2023-02-09 10:00:10,638 INFO hdfs.StateChange (FSDirWriteFileOp.java:logAllocatedBlock(802)) - BLOCK* allocate blk_1092451654_18751000, replicas=10.146.144.69:1019, 10.146.80.45:1019 for /user/hive/warehouse/dc_orig.db/o_dc_http_topic_metric/_flume_parquet_insert_staging/bdyun-suzhou-tw04a0032.su.baidu.internal_1675908007110_628122711
2023-02-09 10:00:11,072 INFO namenode.FSNamesystem (FSNamesystem.java:checkBlocksComplete(3151)) - BLOCK* blk_1092451654_18751000 is COMMITTED but not COMPLETE(numNodes= 0 < minimum = 1) in file /user/hive/warehouse/dc_orig.db/o_dc_http_topic_metric/_flume_parquet_insert_staging/bdyun-suzhou-tw04a0032.su.baidu.internal_1675908007110_628122711
2023-02-09 10:00:11,474 INFO namenode.FSNamesystem (FSNamesystem.java:checkBlocksComplete(3151)) - BLOCK* blk_1092451654_18751000 is COMMITTED but not COMPLETE(numNodes= 0 < minimum = 1) in file /user/hive/warehouse/dc_orig.db/o_dc_http_topic_metric/_flume_parquet_insert_staging/bdyun-suzhou-tw04a0032.su.baidu.internal_1675908007110_628122711
2023-02-09 10:00:12,285 INFO namenode.FSNamesystem (FSNamesystem.java:checkBlocksComplete(3151)) - BLOCK* blk_1092451654_18751000 is COMMITTED but not COMPLETE(numNodes= 0 < minimum = 1) in file /user/hive/warehouse/dc_orig.db/o_dc_http_topic_metric/_flume_parquet_insert_staging/bdyun-suzhou-tw04a0032.su.baidu.internal_1675908007110_628122711
2023-02-09 10:00:13,887 INFO namenode.FSNamesystem (FSNamesystem.java:checkBlocksComplete(3151)) - BLOCK* blk_1092451654_18751000 is COMMITTED but not COMPLETE(numNodes= 0 < minimum = 1) in file /user/hive/warehouse/dc_orig.db/o_dc_http_topic_metric/_flume_parquet_insert_staging/bdyun-suzhou-tw04a0032.su.baidu.internal_1675908007110_628122711
2023-02-09 10:00:17,089 INFO namenode.FSNamesystem (FSNamesystem.java:checkBlocksComplete(3151)) - BLOCK* blk_1092451654_18751000 is COMMITTED but not COMPLETE(numNodes= 0 < minimum = 1) in file /user/hive/warehouse/dc_orig.db/o_dc_http_topic_metric/_flume_parquet_insert_staging/bdyun-suzhou-tw04a0032.su.baidu.internal_1675908007110_628122711
2023-02-09 10:00:23,490 INFO namenode.FSNamesystem (FSNamesystem.java:checkBlocksComplete(3151)) - BLOCK* blk_1092451654_18751000 is COMMITTED but not COMPLETE(numNodes= 0 < minimum = 1) in file /user/hive/warehouse/dc_orig.db/o_dc_http_topic_metric/_flume_parquet_insert_staging/bdyun-suzhou-tw04a0032.su.baidu.internal_1675908007110_628122711
