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Li Cheng edited comment on HDDS-2356 at 10/29/19 2:25 AM: ---------------------------------------------------------- [~bharat] I'm using python to write to a OS path. sth like: {code:java} // code placeholder for sub_file in sub_files: sub_file_path = dir + sub_file with open(dest_dir + sub_file_path, "w") as fw: with open(sub_file_path, "r") as fr: line = fr.readline() while line: num += 1 output += line if (num >= 2000): fw.write(output) output = "" num = 0 line = fr.readline() fw.write(output) {code} was (Author: timmylicheng): [~bharat] I'm using python to write to a OS path. sth like: {code:java} // code placeholder {code} for sub_file in sub_files: sub_file_path = dir + sub_file with open(dest_dir + sub_file_path, "w") as fw: with open(sub_file_path, "r") as fr: line = fr.readline() while line: num += 1 output += line if (num >= 2000): fw.write(output) output = "" num = 0 line = fr.readline() fw.write(output) > 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: -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org