Robin Schimpf created COMPRESS-571:
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Summary: 7z random access failes on shuffled entry list
Key: COMPRESS-571
URL: https://issues.apache.org/jira/browse/COMPRESS-571
Project: Commons Compress
Issue Type: Bug
Affects Versions: 1.20
Reporter: Robin Schimpf
I noticed a problem on a 7z file and could reproduce the error if the
InputStream is retrieved after shuffling the entries.
This test fails with a checksum verification error
{code:java}
@Test
public void retrieveInputStreamForShuffledEntries() throws IOException {
try (final SevenZFile sevenZFile = new
SevenZFile(getFile("COMPRESS-256.7z"))) {
List<SevenZArchiveEntry> entries = (List<SevenZArchiveEntry>)
sevenZFile.getEntries();
Collections.shuffle(entries);
for (final SevenZArchiveEntry entry : entries) {
IOUtils.toByteArray(sevenZFile.getInputStream(entry));
}
}
}
{code}
This is the exception
{code:java}
java.io.IOException: Checksum verification failed
at
org.apache.commons.compress.utils.ChecksumVerifyingInputStream.read(ChecksumVerifyingInputStream.java:94)
at
org.apache.commons.compress.utils.ChecksumVerifyingInputStream.read(ChecksumVerifyingInputStream.java:74)
at org.apache.commons.compress.utils.IOUtils.copy(IOUtils.java:87)
at org.apache.commons.compress.utils.IOUtils.copy(IOUtils.java:62)
at
org.apache.commons.compress.utils.IOUtils.toByteArray(IOUtils.java:247)
at
org.apache.commons.compress.archivers.sevenz.SevenZFileTest.retrieveInputStreamForShuffledEntries(SevenZFileTest.java:616)
{code}
This also fails on the current master with the same error
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