zoltar9264 commented on code in PR #22458:
URL: https://github.com/apache/flink/pull/22458#discussion_r1176280348
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flink-state-backends/flink-statebackend-rocksdb/src/main/java/org/apache/flink/contrib/streaming/state/RocksDBResourceContainer.java:
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@@ -59,6 +59,9 @@
public final class RocksDBResourceContainer implements AutoCloseable {
private static final Logger LOG =
LoggerFactory.getLogger(RocksDBResourceContainer.class);
+ // the filename length limit is 255 on most operating systems
+ private static final int INSTANCE_PATH_LENGTH_LIMIT = 255 -
"_LOG".length();
Review Comment:
Because when log dir is set, rocksdb will add the suffix '_LOG' to the
instance path as the log file name, you can check it in
https://github.com/ververica/frocksdb/blob/FRocksDB-6.20.3/file/filename.cc#L31
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