Sivaprasanna Sethuraman created NIFI-5000:
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Summary: ListHDFS doesn't list files from updated 'directory'
Key: NIFI-5000
URL: https://issues.apache.org/jira/browse/NIFI-5000
Project: Apache NiFi
Issue Type: Bug
Components: Extensions
Affects Versions: 1.5.0, 1.4.0, 1.3.0, 1.2.0
Reporter: Sivaprasanna Sethuraman
Assignee: Sivaprasanna Sethuraman
ListHDFS lists files and saves the latest listed files' modified time -
latestTimestampListed and latestTimestampEmitted in the `StateMap`. It is
overriding `onPropertyModified` to check if the `Directory` or the `File
Filter` has been modified and if they are indeed modified, it will reset the
statemap variables to `-1L` so as to list all the files from the updated
`Directory` or according to the updated `File Filter`. However it is not
working as intended.
*Scenario:*
# Create two directories in HDFS
## > hdfs dfs -mkdir /test1
## > hdfs dfs -mkdir /test2
# Write files to the above directories in the following order:
## > hdfs dfs -put sample.txt */test1/t1_1.txt* --
## > hdfs dfs -put sample.txt */test2/t2_1.txt*
## > hdfs dfs -put sample.txt */test1/t1_2.txt*
# Configure ListHDFS and set *Directory* to */test1* and start the processor.
It will produce two flowfiles: *t1_1.txt* and *t1_2.txt*
# Stop the processor. Configure and set *Directory* to */test2*. Ideally the
state variables (listed and emitted timestamp) should be reset and they should
list the file *t2_1.txt* but it is not.
# Now put one more file to test2:
## > hdfs dfs -put sample.txt */test2/2_2.txt*
# This would have listed the file *t2_2.txt*. File t2_1.txt is missed
Little debugging helped me found that the `onPropertyModified` indeed works as
intended but somewhere else the code still reads the last saved state i.e. the
modified time of */test1/t1_2.txt*
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