anuengineer commented on a change in pull request #152: HDDS-2467. Allow
running Freon validators with limited memory
URL: https://github.com/apache/hadoop-ozone/pull/152#discussion_r346449625
##########
File path:
hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/OzoneClientKeyValidator.java
##########
@@ -80,16 +91,74 @@ public Void call() throws Exception {
return null;
}
+ private void readReference() throws IOException {
+ String name = generateObjectName(0);
+
+ if (!stream) {
+ // first obtain key size to be able to allocate exact buffer for keys
+ referenceKeySize = getKeySize(name);
+
+ // force stream if key is too large for byte[]
+ // (limit taken from ByteArrayOutputStream)
+ if (referenceKeySize > Integer.MAX_VALUE - 8) {
Review comment:
You can force this much sooner, say 1 GB ? or even 100MB. Otherwise, the
virtual memory reservation would be huge.
And practically, does it matter?
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