in src/main/java/org/elasticsearch/aliyun/oss/blobstore/OssBlobStore.java [162:167]
void writeBlob(String blobName, InputStream inputStream, long blobSize)
throws OSSException, ClientException, IOException {
ObjectMetadata meta = new ObjectMetadata();
meta.setContentLength(blobSize);
doPrivilegedAndRefreshClient(() -> this.client.putObject(bucket, blobName, inputStream, meta));
}