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Briefly, this error occurs when OpenSearch is unable to close the blob store, which is used for storing large amounts of binary data. This could be due to a variety of reasons such as insufficient permissions, a locked file, or a network issue. To resolve this, you could try restarting the OpenSearch service, checking the file permissions, ensuring the blob store is not being accessed by another process, or investigating network connectivity issues.
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This guide will help you check for common problems that cause the log ” cannot close blob store ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: repositories, blobstore.
Log Context
Log “cannot close blob store” classname is BlobStoreRepository.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
} if (store != null) { try { store.close(); } catch (Exception t) { logger.warn("cannot close blob store"; t); } } } @Override