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Fix possible truncated WAL segments when an error occurs mid-write.

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The file write object destructors called close() and finalized the file even if it was not completely written.  This was an issue in both the C and Perl code.

Rewrite the destructors to simply free resources (like file handles) rather than calling the close() method.  This leaves the temp file in place for filesystems that use temp files.

Add unit tests to prevent regression.

Reported by blogh.
This commit is contained in:
David Steele
2019-02-15 11:52:39 +02:00
parent 2cd204f380
commit d211c2b8b5
10 changed files with 87 additions and 10 deletions
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1
test/lib/pgBackRestTest/Module/Common/CommonIoHandlePerlTest.pm
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@ -197,6 +197,7 @@ sub run
my $oIoHandle = $self->testResult(sub {new pgBackRest::Common::Io::Handle("'$strFile'", $fhRead)}, '[object]', 'open read');
$self->testResult(sub {$oIoHandle->read(\$tContent, $iFileLengthHalf)}, $iFileLengthHalf, ' read');
$self->testResult(sub {$oIoHandle->close()}, true, ' close');
$self->testResult(sub {$oIoHandle->close()}, true, ' close again');
$self->testResult(sub {$oIoHandle->result(COMMON_IO_HANDLE)}, $iFileLengthHalf, ' check result');