Sangjin Lee created YARN-5109:
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Summary: timestamps are stored unencoded causing parse errors
Key: YARN-5109
URL: https://issues.apache.org/jira/browse/YARN-5109
Project: Hadoop YARN
Issue Type: Sub-task
Components: timelineserver
Affects Versions: YARN-2928
Reporter: Sangjin Lee
Priority: Blocker
When we store timestamps (for example as part of the row key or part of the
column name for an event), the bytes are used as is without any encoding. If
the byte value happens to contain a separator character we use (e.g. "!" or
"="), it causes a parse failure when we read it.
I came across this while looking into this error in the timeline reader:
{noformat}
2016-05-17 21:28:38,643 WARN
org.apache.hadoop.yarn.server.timelineservice.storage.common.TimelineStorageUtils:
incorrectly formatted column name: it will be discarded
{noformat}
I traced the data that was causing this, and the column name (for the event)
was the following:
{noformat}
i:e!YARN_RM_CONTAINER_CREATED=\x7F\xFF\xFE\xABDY=\x99=YARN_CONTAINER_ALLOCATED_HOST
{noformat}
Note that the column name is supposed to be of the format (event
id)=(timestamp)=(event info key). However, observe the timestamp portion:
{noformat}
\x7F\xFF\xFE\xABDY=\x99
{noformat}
The presence of the separator ("=") causes the parse error.
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