ArvinDevel commented on a change in pull request #832: Issue 620: Close the
fileChannels for read when they are idle
URL: https://github.com/apache/bookkeeper/pull/832#discussion_r160021944
##########
File path:
bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/EntryLogger.java
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@@ -1091,24 +1156,29 @@ private Header getHeaderForLogId(long entryLogId)
throws IOException {
}
private BufferedReadChannel getChannelForLogId(long entryLogId) throws
IOException {
- BufferedReadChannel fc = getFromChannels(entryLogId);
- if (fc != null) {
- return fc;
+ BufferedReadChannel brc = getFromChannels(entryLogId);
+ if (brc != null) {
+ return brc;
}
+
File file = findFile(entryLogId);
// get channel is used to open an existing entry log file
// it would be better to open using read mode
FileChannel newFc = new RandomAccessFile(file, "r").getChannel();
- FileChannel oldFc = logid2FileChannel.putIfAbsent(entryLogId, newFc);
+ ReferenceCountedFileChannel oldFc =
+ logid2FileChannel.putIfAbsent(entryLogId, new
ReferenceCountedFileChannel(newFc));
if (null != oldFc) {
newFc.close();
- newFc = oldFc;
+ newFc = oldFc.fc;
+ // increment the refCnt
+ oldFc.retain();
Review comment:
you're right, I'll consider this later, thanks.
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