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https://issues.apache.org/jira/browse/HDDS-2356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16961223#comment-16961223
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Bharat Viswanadham commented on HDDS-2356:
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{quote}Also it's print the same pipeline id in s3g logs like crazy. Wonder if
that's expected. [~bharat]
2019-10-28 11:43:08,912 [qtp1383524016-24] INFO - Allocating block with
ExcludeList \{datanodes = [], containerIds = [], pipelineIds = []}
...skipping...
eID=3c94d3f5-3c0e-4994-9c63-dc487071be1a,
PipelineID=3c94d3f5-3c0e-4994-9c63-dc487071be1a,
{quote}
This is a log in allocateNewBlock() in BlockOutputStreamEntryPool.java.
HDDS-2286 changed this behavior to print this info to the logs. As in the
excludeList it is list of pipelineId's, same entry if added again it is adding
again to the list, I think we should have a check to add if it does not exist
in list.
> Multipart upload report errors while writing to ozone Ratis pipeline
> --------------------------------------------------------------------
>
> Key: HDDS-2356
> URL: https://issues.apache.org/jira/browse/HDDS-2356
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Manager
> Affects Versions: 0.4.1
> Environment: Env: 4 VMs in total: 3 Datanodes on 3 VMs, 1 OM & 1 SCM
> on a separate VM
> Reporter: Li Cheng
> Priority: Blocker
> Fix For: 0.5.0
>
>
> Env: 4 VMs in total: 3 Datanodes on 3 VMs, 1 OM & 1 SCM on a separate VM, say
> it's VM0.
> I use goofys as a fuse and enable ozone S3 gateway to mount ozone to a path
> on VM0, while reading data from VM0 local disk and write to mount path. The
> dataset has various sizes of files from 0 byte to GB-level and it has a
> number of ~50,000 files.
> The writing is slow (1GB for ~10 mins) and it stops after around 4GB. As I
> look at hadoop-root-om-VM_50_210_centos.out log, I see OM throwing errors
> related with Multipart upload. This error eventually causes the writing to
> terminate and OM to be closed.
>
> 2019-10-24 16:01:59,527 [OMDoubleBufferFlushThread] ERROR - Terminating with
> exit status 2: OMDoubleBuffer flush
> threadOMDoubleBufferFlushThreadencountered Throwable error
> java.util.ConcurrentModificationException
> at java.util.TreeMap.forEach(TreeMap.java:1004)
> at
> org.apache.hadoop.ozone.om.helpers.OmMultipartKeyInfo.getProto(OmMultipartKeyInfo.java:111)
> at
> org.apache.hadoop.ozone.om.codec.OmMultipartKeyInfoCodec.toPersistedFormat(OmMultipartKeyInfoCodec.java:38)
> at
> org.apache.hadoop.ozone.om.codec.OmMultipartKeyInfoCodec.toPersistedFormat(OmMultipartKeyInfoCodec.java:31)
> at
> org.apache.hadoop.hdds.utils.db.CodecRegistry.asRawData(CodecRegistry.java:68)
> at
> org.apache.hadoop.hdds.utils.db.TypedTable.putWithBatch(TypedTable.java:125)
> at
> org.apache.hadoop.ozone.om.response.s3.multipart.S3MultipartUploadCommitPartResponse.addToDBBatch(S3MultipartUploadCommitPartResponse.java:112)
> at
> org.apache.hadoop.ozone.om.ratis.OzoneManagerDoubleBuffer.lambda$flushTransactions$0(OzoneManagerDoubleBuffer.java:137)
> at java.util.Iterator.forEachRemaining(Iterator.java:116)
> at
> org.apache.hadoop.ozone.om.ratis.OzoneManagerDoubleBuffer.flushTransactions(OzoneManagerDoubleBuffer.java:135)
> at java.lang.Thread.run(Thread.java:745)
> 2019-10-24 16:01:59,629 [shutdown-hook-0] INFO - SHUTDOWN_MSG:
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