mukul1987 commented on a change in pull request #654: HDDS-3150. Implement
getIfExist in Table and use it in CreateKey/File
URL: https://github.com/apache/hadoop-ozone/pull/654#discussion_r390066571
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File path:
hadoop-hdds/framework/src/main/java/org/apache/hadoop/hdds/utils/db/RDBTable.java
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@@ -155,6 +155,32 @@ public boolean isExist(byte[] key) throws IOException {
}
}
+ @Override
+ public byte[] getIfExist(byte[] key) throws IOException {
+ try {
+ // RocksDB#keyMayExist
+ // If the key definitely does not exist in the database, then this
+ // method returns false, else true.
+ rdbMetrics.incNumDBKeyGetIfExistChecks();
+ StringBuilder outValue = new StringBuilder();
+ boolean keyMayExist = db.keyMayExist(handle, key, outValue);
+ if (keyMayExist) {
+ // Not using out value from string builder, as that is causing
+ // IllegalArgumentException during protobuf parsing.
Review comment:
whats the reason for the illegal arguement exception ? Do we have a stack
trace?
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