Li Cheng created HDDS-2356:
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Summary: 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
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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