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https://issues.apache.org/jira/browse/ARROW-8615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated ARROW-8615:
----------------------------------
Labels: pull-request-available (was: )
> [R] Error better and insist on RandomAccessFile in read_feather
> ---------------------------------------------------------------
>
> Key: ARROW-8615
> URL: https://issues.apache.org/jira/browse/ARROW-8615
> Project: Apache Arrow
> Issue Type: Bug
> Components: R
> Affects Versions: 0.16.0, 0.17.0
> Environment: R version 3.6.3 (2020-02-29)
> Platform: x86_64-pc-linux-gnu (64-bit)
> Running under: Ubuntu 18.04.4 LTS
> other attached packages:
> [1] arrow_0.17.0
> loaded via a namespace (and not attached):
> [1] tidyselect_1.0.0 bit_1.1-15.2 compiler_3.6.3 magrittr_1.5
> [5] assertthat_0.2.1 R6_2.4.1 glue_1.4.0 Rcpp_1.0.4.6
> [9] bit64_0.9-7 vctrs_0.2.4 rlang_0.4.5 purrr_0.3.4
> Reporter: Lucas Nesi
> Assignee: Neal Richardson
> Priority: Major
> Labels: pull-request-available
> Attachments: x.gz
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The use of read_feather function with CompressedInputStream fails with the
> error:
>
> {code:java}
> Error in ipc___feather___Reader__Open(file) :
> Invalid: File is too small to be a well-formed file
> {code}
> The minimal code to get it:
> {code:java}
> filename <- "x.gz"
> data <- data.frame(c(1,2), c(3,4), stringsAsFactors=FALSE)
> fos <- FileOutputStream$create(filename)
> codec <- Codec$create("gzip")
> cos <- CompressedOutputStream$create(fos, codec)
> write_feather(data, cos)
> cos$close()
> fos <- ReadableFile$create(filename)
> codec <- Codec$create("gzip")
> cos <- CompressedInputStream$create(fos, codec)
> read_feather(cos)
> {code}
> However, I can extract the file "x.gz" with
> {code:java}
> gzip -d x.gz
> {code}
> and then run in R:
> {code:java}
> fos <- ReadableFile$create("x")
> read_feather(fos);
> c.1..2. c.3..4.
> 1 1 3
> 2 2 4
> {code}
> The codec gzip is available according to:
> {code:java}
> codec_is_available("gzip")
> [1] TRUE{code}
> Attached the generated "x.gz"
>
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