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HBASE-28042 Snapshot corruptions due to non-atomic rename within same filesystem #5369

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merged 5 commits into from
Aug 28, 2023
Merged

HBASE-28042 Snapshot corruptions due to non-atomic rename within same filesystem #5369

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HBASE-28042 Snapshot corruptions due to non-atomic rename within same…
virajjasani Aug 23, 2023
8ca3b0b
test addendum
virajjasani Aug 24, 2023
880ffd7
addendum
virajjasani Aug 24, 2023
0603f20
addendum - test order changes for read/write perm grant
virajjasani Aug 24, 2023
ce1b14e
addendum
virajjasani Aug 24, 2023
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40 changes: 36 additions & 4 deletions hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/SnapshotDescriptionUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -419,11 +419,9 @@ public static void completeSnapshot(Path snapshotDir, Path workingDir, FileSyste
// if this fails
URI workingURI = workingDirFs.getUri();
URI rootURI = fs.getUri();

if (
(!workingURI.getScheme().equals(rootURI.getScheme()) || workingURI.getAuthority() == null
|| !workingURI.getAuthority().equals(rootURI.getAuthority())
|| workingURI.getUserInfo() == null
|| !workingURI.getUserInfo().equals(rootURI.getUserInfo())
(shouldSkipRenameSnapshotDirectories(workingURI, rootURI)
|| !fs.rename(workingDir, snapshotDir))
&& !FileUtil.copy(workingDirFs, workingDir, fs, snapshotDir, true, true, conf)
) {
Expand All @@ -432,6 +430,40 @@ public static void completeSnapshot(Path snapshotDir, Path workingDir, FileSyste
}
}

static boolean shouldSkipRenameSnapshotDirectories(URI workingURI, URI rootURI) {
// check scheme, e.g. file, hdfs
if (
workingURI.getScheme() == null
&& (rootURI.getScheme() != null && !rootURI.getScheme().equalsIgnoreCase("file"))
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Why we need the extra check for the "file" URI? Wouldn't it be enough to return "true" here if workingURI scheme is null and rootURI is not?

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with "file", we could have ignored local fs, but you are right that we don't need such explicit check, let me make this change, thanks

) {
return true;
}
if (workingURI.getScheme() != null && !workingURI.getScheme().equals(rootURI.getScheme())) {
return true;
}

// check Authority, e.g. localhost:port
if (workingURI.getAuthority() == null && rootURI.getAuthority() != null) {
return true;
}
if (
workingURI.getAuthority() != null && !workingURI.getAuthority().equals(rootURI.getAuthority())
) {
return true;
}

// check UGI/userInfo
if (workingURI.getUserInfo() == null && rootURI.getUserInfo() != null) {
return true;
}
if (
workingURI.getUserInfo() != null && !workingURI.getUserInfo().equals(rootURI.getUserInfo())
) {
return true;
}
return false;
}

/**
* Check if the user is this table snapshot's owner
* @param snapshot the table snapshot description
Expand Down
49 changes: 49 additions & 0 deletions ...e-server/src/test/java/org/apache/hadoop/hbase/snapshot/TestSnapshotDescriptionUtils.java
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Expand Up @@ -22,6 +22,7 @@
import static org.junit.Assert.fail;

import java.io.IOException;
import java.net.URI;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
Expand Down Expand Up @@ -191,4 +192,52 @@ public void testIsWithinWorkingDir() throws IOException {
assertTrue(SnapshotDescriptionUtils.isWithinDefaultWorkingDir(
new Path("file:" + hbsaeDir + "/.hbase-snapshot/.tmp/snapshot"), conf));
}

@Test
public void testShouldSkipRenameSnapshotDirectories() {
URI workingDirURI = URI.create("/User/test1");
URI rootDirURI = URI.create("hdfs:///User/test2");

// should skip rename if it's not the same scheme;
assertTrue(
SnapshotDescriptionUtils.shouldSkipRenameSnapshotDirectories(workingDirURI, rootDirURI));

workingDirURI = URI.create("/User/test1");
rootDirURI = URI.create("file:///User/test2");
assertFalse(
SnapshotDescriptionUtils.shouldSkipRenameSnapshotDirectories(workingDirURI, rootDirURI));

// skip rename when either scheme or authority are the not same
workingDirURI = URI.create("hdfs://localhost:8020/User/test1");
rootDirURI = URI.create("hdfs://otherhost:8020/User/test2");
assertTrue(
SnapshotDescriptionUtils.shouldSkipRenameSnapshotDirectories(workingDirURI, rootDirURI));

workingDirURI = URI.create("file:///User/test1");
rootDirURI = URI.create("hdfs://localhost:8020/User/test2");
assertTrue(
SnapshotDescriptionUtils.shouldSkipRenameSnapshotDirectories(workingDirURI, rootDirURI));

workingDirURI = URI.create("hdfs:///User/test1");
rootDirURI = URI.create("hdfs:///User/test2");
assertFalse(
SnapshotDescriptionUtils.shouldSkipRenameSnapshotDirectories(workingDirURI, rootDirURI));

workingDirURI = URI.create("hdfs://localhost:8020/User/test1");
rootDirURI = URI.create("hdfs://localhost:8020/User/test2");
assertFalse(
SnapshotDescriptionUtils.shouldSkipRenameSnapshotDirectories(workingDirURI, rootDirURI));

workingDirURI = URI.create("hdfs://user:password@localhost:8020/User/test1");
rootDirURI = URI.create("hdfs://user:password@localhost:8020/User/test2");
assertFalse(
SnapshotDescriptionUtils.shouldSkipRenameSnapshotDirectories(workingDirURI, rootDirURI));

// skip rename when user information is not the same
workingDirURI = URI.create("hdfs://user:password@localhost:8020/User/test1");
rootDirURI = URI.create("hdfs://user2:password2@localhost:8020/User/test2");
assertTrue(
SnapshotDescriptionUtils.shouldSkipRenameSnapshotDirectories(workingDirURI, rootDirURI));
}

}