pranavsaxena-microsoft commented on code in PR #4998:
URL: https://github.com/apache/hadoop/pull/4998#discussion_r1114022360
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/alias/LocalKeyStoreProvider.java:
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@@ -142,20 +142,26 @@ protected void initFileSystem(URI uri)
@Override
public void flush() throws IOException {
- super.flush();
- if (LOG.isDebugEnabled()) {
- LOG.debug("Resetting permissions to '" + permissions + "'");
- }
- if (!Shell.WINDOWS) {
- Files.setPosixFilePermissions(Paths.get(file.getCanonicalPath()),
- permissions);
- } else {
- // FsPermission expects a 10-character string because of the leading
- // directory indicator, i.e. "drwx------". The JDK toString method
returns
- // a 9-character string, so prepend a leading character.
- FsPermission fsPermission = FsPermission.valueOf(
- "-" + PosixFilePermissions.toString(permissions));
- FileUtil.setPermission(file, fsPermission);
+ super.getWriteLock().lock();
+ try {
+ file.createNewFile();
+ if (LOG.isDebugEnabled()) {
+ LOG.debug("Resetting permissions to '" + permissions + "'");
+ }
+ if (!Shell.WINDOWS) {
+ Files.setPosixFilePermissions(Paths.get(file.getCanonicalPath()),
+ permissions);
+ } else {
+ // FsPermission expects a 10-character string because of the leading
+ // directory indicator, i.e. "drwx------". The JDK toString method
returns
+ // a 9-character string, so prepend a leading character.
+ FsPermission fsPermission = FsPermission.valueOf(
+ "-" + PosixFilePermissions.toString(permissions));
+ FileUtil.setPermission(file, fsPermission);
+ }
Review Comment:
In the method getOutputStreamForKeystore(), before sending outputStream,
should it be checked that the file is empty. Reason being, between creatingFile
and setting permissions, there could be that some other process puts something
in the file.
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