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Vitalii Diravka commented on DRILL-5006: ---------------------------------------- Possibly DRILL-6477 solves this issue. Could you confirm that? > Drill web UI hangs if execute a query with a large result set > ------------------------------------------------------------- > > Key: DRILL-5006 > URL: https://issues.apache.org/jira/browse/DRILL-5006 > Project: Apache Drill > Issue Type: Bug > Affects Versions: 1.8.0 > Reporter: Paul Rogers > Priority: Minor > > Using a pipe-separated file 388 MB in size, do a SELECT * on the file (also > added an ORDER BY). This produces a huge result set. Do this query in the web > UI. A number of things happen: > * Using top, we see that Drill grinds on the query for a while, as expected. > * Top shows Drill to stop consuming CPU. The web UI does nothing during this > time. This time lasts several minutes. > * Drill eventually shows the first 30 rows of the query. > * The browser "spins" forever waiting for the server to finish sending data. > * The Safari browser enters the "spinning beachball" state on that page > because of memory use, waiting for data, etc. > Actually, it seems that the server is busily returning zillions of empty > lines in the HTML. Scrolling down past the first 30 rows shows miles of empty > white space. > Fetching of data seems to never complete, even after many minutes. > It is known that the web UI is limited. But, it should not be possible to > overwhelm it with an errant query. Possible solutions: > 1. Spill large results to disk, then page them in the display. Discard them > after the web session ends, after some amount of time, etc. (This is that > long-term, but hard solution.) > 2. Read the first 30 (or whatever results) and display them. Read and discard > all other results to keep the browser (or web server or whatever is hanging) > from becoming overloaded. -- This message was sent by Atlassian JIRA (v7.6.3#76005)