Chris A. Mattmann created SOLR-7137:
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Summary: Upgrade to Tika 1.7 in 4_10_3 branch
Key: SOLR-7137
URL: https://issues.apache.org/jira/browse/SOLR-7137
Project: Solr
Issue Type: Bug
Components: contrib - Solr Cell (Tika extraction)
Affects Versions: 4.10.3
Reporter: Chris A. Mattmann
Priority: Blocker
Fix For: 4.10.4
I have been trying out SolrCell as an alternative to ingesting around 40M
images using Tesseract/OCR and Tika. I noticed in 4.10.3 Tika is pinned to 1.5.
In 1.5 Tika and in SolrCell 4.10.3, only about 5600 images of a subset of
50,000 are ingested when I run a series of 50k cURL commands to the extract
handler. I had a feeling it has something to do with the fact that some of the
characters extracted are oddball characters (4@#@#/ ^^^^) due to Tesseract not
always extracting the right text. But then I remembered Tesseract didn't land
in Tika until 1.7.
So regardless, I thought I'd upgrade the 4.10.x branch to Tika 1.7. This is a
trivial patch to do so, attached (Tika + compress updates). Now all 50K images
on the 50K subset are ingested, but I'm noticing something else weird. Despite
the fact that Tesseract is called, and despite the fact that on certain images
I can verify text is extracted, all I am getting in the "content" field of
SolrCell is a bunch of "\n \n \n \n \n \n" text. Extremely odd.
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