我有一个18M Excel电子表格要解析,而Spreadsheet::ParseExcel
耗费了大量内存,我不得不切换到Spreadsheet::ParseExcel::Stream。它在我的VM上工作正常,它在我们的登台服务器上工作正常,但在我们的生产服务器上(配置方式相同),我收到此错误:
Can't call method "transfer" on an undefined value at \
lib/Spreadsheet/ParseExcel/Stream/XLS.pm line 31.
来自以下代码:
my ($wb, $idx, $row, $col, $cell);
my $tmp = my $handler = sub {
($wb, $idx, $row, $col, $cell) = @_;
$parser->transfer($main); XXX here's where we die
};
my $tmp_p = $parser = Coro::State->new(sub {
$xls->Parse($file);
# Flag the generator that we're done
undef $xls;
# If we don't transfer back when done parsing,
# it's an implicit program exit (oops!)
$parser->transfer($main)
});
weaken($parser);
weaken
看起来很可疑,所以除非refcount大于1,否则我试图不削弱,但同样的问题也会发生。我检测了代码以获得堆栈跟踪并得到了这个:
parser is undefined at lib/Spreadsheet/ParseExcel/Stream/XLS.pm line 29.
Spreadsheet::ParseExcel::Stream::XLS::__ANON__ \
('Spreadsheet::ParseExcel::Workbook=HASH(0x6cd4a08)', 0, 2, 1, \
'Spreadsheet::ParseExcel::Cell=HASH(0x1387ce78)') called at \
/usr/share/perl5/Spreadsheet/ParseExcel.pm line 2152
Spreadsheet::ParseExcel::_NewCell( \
'Spreadsheet::ParseExcel::Workbook=HASH(0x6cd4a08)', 2, 1, \
'Kind', 'PackedIdx', 'Val', 'Dean', 'FormatNo', 25, ...) \
called at /usr/share/perl5/Spreadsheet/ParseExcel.pm line 896
Spreadsheet::ParseExcel::_subLabelSST( \
'Spreadsheet::ParseExcel::Workbook=HASH(0x6cd4a08)', 253, 10, \
'\x{2}\x{0}\x{1}\x{0}\x{19}\x{0}2\x{0}\x{0}\x{0}') \
called at /usr/share/perl5/Spreadsheet/ParseExcel.pm line 292
Spreadsheet::ParseExcel::parse( \
'Spreadsheet::ParseExcel=HASH(0x6cd1810)', '2013-09-13.xls') \
called at lib/Spreadsheet/ParseExcel/Stream/XLS.pm line 35
Spreadsheet::ParseExcel::Stream::XLS::__ANON__ \
called at new_importer.pl line 0
这告诉我解析器读取第一行和第二行,但由于某种原因它在第三行死亡。
我尝试重建Spreadsheet::ParseExcel::Stream
并且似乎没有任何错误(所有测试都通过)。我还重新编译了Coro
(同样的结果)。
我很神秘。有人有什么想法吗?
答案 0 :(得分:15)
问题变得相当奇怪,看起来像这个伪代码:
stream1 = open first excel stream
sheet1 = stream1.sheet // get spreadsheet ready for reading
if in verbose mode:
stream2 = open second excel stream
sheet2 = stream2.sheet
count++ while sheet2.get_row
say "We have $count records"
我们发现,当且仅当我们处于详细模式时才会出现此问题。通过让两个流指向同一个文档,我们的生产代码会失败,尽管这在其他框上运行良好。通过在打开常规流来读取文档之前计算行数并关闭该流,我们解决了这个问题。