Elastic search fails when node.lock file is not empty

OS : Windows 64-bit
ElasticSearch : 6.6.2
Java: 1.8.151
Cluster: Single Node cluster
Index strategy: Indices are created daily and programmatically
Shard: Single shard per index and no replication

When node.lock has the following content, elastic search stops working. Even restart does not help.

"java.lang.OutOfMemoryError: Java heap space
Dumping heap to data ...
Unable to create data: File exists"

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