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The new behavior is working as expected now. Two other observations:

  1. The error message(s) are not great when you give bad input. For example, if I give too many or too few column_names, the error I get is Invalid: Empty CSV file, same as what I was getting before your latest change to the skip_rows behavior. It would be nice if the error message were accurate, and even better if it were more specific so that I as a user might know how to fix my bad input.
  2. On a related note, if ignore_empty_lines is false and there are empty lines, it fails to parse (again, with Invalid: Empty CSV file).

Happy to take those up in a separate ticket if you prefer, just observed them while working on this.

@pitrou
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pitrou commented Jul 22, 2019

A separate ticket sounds fine.

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Codecov Report

❗ No coverage uploaded for pull request base (ARROW-5747-csv-column-names@f7c406f). Click here to learn what that means.
The diff coverage is 100%.

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@@                      Coverage Diff                       @@
##             ARROW-5747-csv-column-names       #4   +/-   ##
==============================================================
  Coverage                               ?   75.27%           
==============================================================
  Files                                  ?       57           
  Lines                                  ?     3713           
  Branches                               ?        0           
==============================================================
  Hits                                   ?     2795           
  Misses                                 ?      918           
  Partials                               ?        0
Impacted Files Coverage Δ
r/src/csv.cpp 100% <100%> (ø)
r/R/csv.R 97.8% <100%> (ø)

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codecov bot commented Jul 22, 2019

Codecov Report

❗ No coverage uploaded for pull request base (ARROW-5747-csv-column-names@f7c406f). Click here to learn what that means.
The diff coverage is 100%.

Impacted file tree graph

@@                      Coverage Diff                       @@
##             ARROW-5747-csv-column-names       #4   +/-   ##
==============================================================
  Coverage                               ?   75.27%           
==============================================================
  Files                                  ?       57           
  Lines                                  ?     3713           
  Branches                               ?        0           
==============================================================
  Hits                                   ?     2795           
  Misses                                 ?      918           
  Partials                               ?        0
Impacted Files Coverage Δ
r/src/csv.cpp 100% <100%> (ø)
r/R/csv.R 97.8% <100%> (ø)

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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@pitrou pitrou merged this pull request into pitrou:ARROW-5747-csv-column-names Jul 23, 2019
pitrou pushed a commit that referenced this pull request Feb 24, 2020
…comments.

The reset method allow the data structures to be re-used so they don't have to be allocated over and over again.

Closes apache#6430 from richardartoul/ra/merge-upstream and squashes the following commits:

5a08281 <Richard Artoul> Add license to test file
d76be05 <Richard Artoul> Add test for data reset
d102b1f <Richard Artoul> Add tests
d3e6e67 <Richard Artoul> cleanup comments
c8525ae <Richard Artoul> Add Reset method to int array (#5)
489ca25 <Richard Artoul> Fix array.setData() to retain before release (#4)
88cd05f <Richard Artoul> Add reset method to Data (#3)
6d1b277 <Richard Artoul> Add Reset() method to String array (#2)
dca2303 <Richard Artoul> Add Reset method to buffer and cleanup comments (#1)

Lead-authored-by: Richard Artoul <richard.artoul@datadoghq.com>
Co-authored-by: Richard Artoul <richardartoul@gmail.com>
Signed-off-by: Sebastien Binet <binet@cern.ch>
pitrou pushed a commit that referenced this pull request May 12, 2020
This PR enables tests for `ARROW_COMPUTE`, `ARROW_DATASET`, `ARROW_FILESYSTEM`, `ARROW_HDFS`, `ARROW_ORC`, and `ARROW_IPC` (default on). apache#7131 enabled a minimal set of tests as a starting point.

I confirmed that these tests pass locally with the current master. In the current TravisCI environment, we cannot see this result due to a lot of error messages in `arrow-utility-test`.

```
$ git log | head -1
commit ed5f534
% ctest
...
      Start  1: arrow-array-test
 1/51 Test  #1: arrow-array-test .....................   Passed    4.62 sec
      Start  2: arrow-buffer-test
 2/51 Test  #2: arrow-buffer-test ....................   Passed    0.14 sec
      Start  3: arrow-extension-type-test
 3/51 Test  #3: arrow-extension-type-test ............   Passed    0.12 sec
      Start  4: arrow-misc-test
 4/51 Test  #4: arrow-misc-test ......................   Passed    0.14 sec
      Start  5: arrow-public-api-test
 5/51 Test  #5: arrow-public-api-test ................   Passed    0.12 sec
      Start  6: arrow-scalar-test
 6/51 Test  #6: arrow-scalar-test ....................   Passed    0.13 sec
      Start  7: arrow-type-test
 7/51 Test  #7: arrow-type-test ......................   Passed    0.14 sec
      Start  8: arrow-table-test
 8/51 Test  #8: arrow-table-test .....................   Passed    0.13 sec
      Start  9: arrow-tensor-test
 9/51 Test  #9: arrow-tensor-test ....................   Passed    0.13 sec
      Start 10: arrow-sparse-tensor-test
10/51 Test #10: arrow-sparse-tensor-test .............   Passed    0.16 sec
      Start 11: arrow-stl-test
11/51 Test #11: arrow-stl-test .......................   Passed    0.12 sec
      Start 12: arrow-concatenate-test
12/51 Test #12: arrow-concatenate-test ...............   Passed    0.53 sec
      Start 13: arrow-diff-test
13/51 Test #13: arrow-diff-test ......................   Passed    1.45 sec
      Start 14: arrow-c-bridge-test
14/51 Test apache#14: arrow-c-bridge-test ..................   Passed    0.18 sec
      Start 15: arrow-io-buffered-test
15/51 Test apache#15: arrow-io-buffered-test ...............   Passed    0.20 sec
      Start 16: arrow-io-compressed-test
16/51 Test apache#16: arrow-io-compressed-test .............   Passed    3.48 sec
      Start 17: arrow-io-file-test
17/51 Test apache#17: arrow-io-file-test ...................   Passed    0.74 sec
      Start 18: arrow-io-hdfs-test
18/51 Test apache#18: arrow-io-hdfs-test ...................   Passed    0.12 sec
      Start 19: arrow-io-memory-test
19/51 Test apache#19: arrow-io-memory-test .................   Passed    2.77 sec
      Start 20: arrow-utility-test
20/51 Test apache#20: arrow-utility-test ...................***Failed    5.65 sec
      Start 21: arrow-threading-utility-test
21/51 Test apache#21: arrow-threading-utility-test .........   Passed    1.34 sec
      Start 22: arrow-compute-compute-test
22/51 Test apache#22: arrow-compute-compute-test ...........   Passed    0.13 sec
      Start 23: arrow-compute-boolean-test
23/51 Test apache#23: arrow-compute-boolean-test ...........   Passed    0.15 sec
      Start 24: arrow-compute-cast-test
24/51 Test apache#24: arrow-compute-cast-test ..............   Passed    0.22 sec
      Start 25: arrow-compute-hash-test
25/51 Test apache#25: arrow-compute-hash-test ..............   Passed    2.61 sec
      Start 26: arrow-compute-isin-test
26/51 Test apache#26: arrow-compute-isin-test ..............   Passed    0.81 sec
      Start 27: arrow-compute-match-test
27/51 Test apache#27: arrow-compute-match-test .............   Passed    0.40 sec
      Start 28: arrow-compute-sort-to-indices-test
28/51 Test apache#28: arrow-compute-sort-to-indices-test ...   Passed    3.33 sec
      Start 29: arrow-compute-nth-to-indices-test
29/51 Test apache#29: arrow-compute-nth-to-indices-test ....   Passed    1.51 sec
      Start 30: arrow-compute-util-internal-test
30/51 Test apache#30: arrow-compute-util-internal-test .....   Passed    0.13 sec
      Start 31: arrow-compute-add-test
31/51 Test apache#31: arrow-compute-add-test ...............   Passed    0.12 sec
      Start 32: arrow-compute-aggregate-test
32/51 Test apache#32: arrow-compute-aggregate-test .........   Passed   14.70 sec
      Start 33: arrow-compute-compare-test
33/51 Test apache#33: arrow-compute-compare-test ...........   Passed    7.96 sec
      Start 34: arrow-compute-take-test
34/51 Test apache#34: arrow-compute-take-test ..............   Passed    4.80 sec
      Start 35: arrow-compute-filter-test
35/51 Test apache#35: arrow-compute-filter-test ............   Passed    8.23 sec
      Start 36: arrow-dataset-dataset-test
36/51 Test apache#36: arrow-dataset-dataset-test ...........   Passed    0.25 sec
      Start 37: arrow-dataset-discovery-test
37/51 Test apache#37: arrow-dataset-discovery-test .........   Passed    0.13 sec
      Start 38: arrow-dataset-file-ipc-test
38/51 Test apache#38: arrow-dataset-file-ipc-test ..........   Passed    0.21 sec
      Start 39: arrow-dataset-file-test
39/51 Test apache#39: arrow-dataset-file-test ..............   Passed    0.12 sec
      Start 40: arrow-dataset-filter-test
40/51 Test apache#40: arrow-dataset-filter-test ............   Passed    0.16 sec
      Start 41: arrow-dataset-partition-test
41/51 Test apache#41: arrow-dataset-partition-test .........   Passed    0.13 sec
      Start 42: arrow-dataset-scanner-test
42/51 Test apache#42: arrow-dataset-scanner-test ...........   Passed    0.20 sec
      Start 43: arrow-filesystem-test
43/51 Test apache#43: arrow-filesystem-test ................   Passed    1.62 sec
      Start 44: arrow-hdfs-test
44/51 Test apache#44: arrow-hdfs-test ......................   Passed    0.13 sec
      Start 45: arrow-feather-test
45/51 Test apache#45: arrow-feather-test ...................   Passed    0.91 sec
      Start 46: arrow-ipc-read-write-test
46/51 Test apache#46: arrow-ipc-read-write-test ............   Passed    5.77 sec
      Start 47: arrow-ipc-json-simple-test
47/51 Test apache#47: arrow-ipc-json-simple-test ...........   Passed    0.16 sec
      Start 48: arrow-ipc-json-test
48/51 Test apache#48: arrow-ipc-json-test ..................   Passed    0.27 sec
      Start 49: arrow-json-integration-test
49/51 Test apache#49: arrow-json-integration-test ..........   Passed    0.13 sec
      Start 50: arrow-json-test
50/51 Test apache#50: arrow-json-test ......................   Passed    0.26 sec
      Start 51: arrow-orc-adapter-test
51/51 Test apache#51: arrow-orc-adapter-test ...............   Passed    1.92 sec

98% tests passed, 1 tests failed out of 51

Label Time Summary:
arrow-tests      =  27.38 sec (27 tests)
arrow_compute    =  45.11 sec (14 tests)
arrow_dataset    =   1.21 sec (7 tests)
arrow_ipc        =   6.20 sec (3 tests)
unittest         =  79.91 sec (51 tests)

Total Test time (real) =  79.99 sec

The following tests FAILED:
	 20 - arrow-utility-test (Failed)
Errors while running CTest
```

Closes apache#7142 from kiszk/ARROW-8754

Authored-by: Kazuaki Ishizaki <ishizaki@jp.ibm.com>
Signed-off-by: Sutou Kouhei <kou@clear-code.com>
pitrou added a commit that referenced this pull request Apr 7, 2021
From a deadlocked run...

```
#0  0x00007f8a5d48dccd in __lll_lock_wait () from /lib64/libpthread.so.0
#1  0x00007f8a5d486f05 in pthread_mutex_lock () from /lib64/libpthread.so.0
#2  0x00007f8a566e7e89 in arrow::internal::FnOnce<void ()>::FnImpl<arrow::Future<Aws::Utils::Outcome<Aws::S3::Model::ListObjectsV2Result, Aws::S3::S3Error> >::Callback<arrow::fs::(anonymous namespace)::TreeWalker::ListObjectsV2Handler> >::invoke() () from /arrow/r/check/arrow.Rcheck/arrow/libs/arrow.so
#3  0x00007f8a5650efa0 in arrow::FutureImpl::AddCallback(arrow::internal::FnOnce<void ()>) () from /arrow/r/check/arrow.Rcheck/arrow/libs/arrow.so
#4  0x00007f8a566e67a9 in arrow::fs::(anonymous namespace)::TreeWalker::ListObjectsV2Handler::SpawnListObjectsV2() () from /arrow/r/check/arrow.Rcheck/arrow/libs/arrow.so
#5  0x00007f8a566e723f in arrow::fs::(anonymous namespace)::TreeWalker::WalkChild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int) () from /arrow/r/check/arrow.Rcheck/arrow/libs/arrow.so
#6  0x00007f8a566e827d in arrow::internal::FnOnce<void ()>::FnImpl<arrow::Future<Aws::Utils::Outcome<Aws::S3::Model::ListObjectsV2Result, Aws::S3::S3Error> >::Callback<arrow::fs::(anonymous namespace)::TreeWalker::ListObjectsV2Handler> >::invoke() () from /arrow/r/check/arrow.Rcheck/arrow/libs/arrow.so
#7  0x00007f8a5650efa0 in arrow::FutureImpl::AddCallback(arrow::internal::FnOnce<void ()>) () from /arrow/r/check/arrow.Rcheck/arrow/libs/arrow.so
#8  0x00007f8a566e67a9 in arrow::fs::(anonymous namespace)::TreeWalker::ListObjectsV2Handler::SpawnListObjectsV2() () from /arrow/r/check/arrow.Rcheck/arrow/libs/arrow.so
#9  0x00007f8a566e723f in arrow::fs::(anonymous namespace)::TreeWalker::WalkChild(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int) () from /arrow/r/check/arrow.Rcheck/arrow/libs/arrow.so
#10 0x00007f8a566e74b1 in arrow::fs::(anonymous namespace)::TreeWalker::DoWalk() () from /arrow/r/check/arrow.Rcheck/arrow/libs/arrow.so
```

The callback `ListObjectsV2Handler` is being called recursively and the mutex is non-reentrant thus deadlock.

To fix it I got rid of the mutex on `TreeWalker` by using `arrow::util::internal::TaskGroup` instead of manually tracking the #/status of in-flight requests.

Closes apache#9842 from westonpace/bugfix/arrow-12040

Lead-authored-by: Weston Pace <weston.pace@gmail.com>
Co-authored-by: Antoine Pitrou <antoine@python.org>
Signed-off-by: Antoine Pitrou <antoine@python.org>
pitrou pushed a commit that referenced this pull request Jun 16, 2021
Before change:

```
Direct leak of 65536 byte(s) in 1 object(s) allocated from:
    #0 0x522f09 in
    #1 0x7f28ae5826f4 in
    #2 0x7f28ae57fa5d in
    #3 0x7f28ae58cb0f in
    #4 0x7f28ae58bda0 in
    ...
```

After change:
```
Direct leak of 65536 byte(s) in 1 object(s) allocated from:
    #0 0x522f09 in posix_memalign (/build/cpp/debug/arrow-dataset-file-csv-test+0x522f09)
    #1 0x7f28ae5826f4 in arrow::(anonymous namespace)::SystemAllocator::AllocateAligned(long, unsigned char**) /arrow/cpp/src/arrow/memory_pool.cc:213:24
    #2 0x7f28ae57fa5d in arrow::BaseMemoryPoolImpl<arrow::(anonymous namespace)::SystemAllocator>::Allocate(long, unsigned char**) /arrow/cpp/src/arrow/memory_pool.cc:405:5
    #3 0x7f28ae58cb0f in arrow::PoolBuffer::Reserve(long) /arrow/cpp/src/arrow/memory_pool.cc:717:9
    #4 0x7f28ae58bda0 in arrow::PoolBuffer::Resize(long, bool) /arrow/cpp/src/arrow/memory_pool.cc:741:7
    ...
```

Closes apache#10498 from westonpace/feature/ARROW-13027--c-fix-asan-stack-traces-in-ci

Authored-by: Weston Pace <weston.pace@gmail.com>
Signed-off-by: Antoine Pitrou <antoine@python.org>
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