Eugene Kirpichov created BEAM-2628:
--------------------------------------
Summary: AvroSource.split() sequentially opens every matched file
Key: BEAM-2628
URL: https://issues.apache.org/jira/browse/BEAM-2628
Project: Beam
Issue Type: Bug
Components: sdk-java-core
Reporter: Eugene Kirpichov
Assignee: Eugene Kirpichov
When you do AvroIO.read().from(filepattern), during splitting of AvroSource the
filepattern gets expanded into N files, and then for each of the N files we do
this:
https://github.com/apache/beam/blob/v2.0.0/sdks/java/core/src/main/java/org/apache/beam/sdk/io/AvroSource.java#L259
This is very slow. E.g. one job was reading 15,000 files, and it took almost 2
hours to split the source because opening each file and reading schema was
taking about 0.5s.
I'm not quite sure why we need the file metadata while splitting...
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
