Metadta content not retrieved

[Madasamy P，修改在7 年前。]

List<DDMStructure> ddmStructures = DDMStructureLocalServiceUtil.getClassStructures(themeDisplay1.getCompanyId(), PortalUtil.getClassNameId(RawMetadataProcessor.class), new StructureStructureKeyComparator(true));
//System.out.println("DDMStructure value"+ddmStructures+" for count"+w);
Fields fields = null;

for (DDMStructure ddmStructure : ddmStructures) {

//System.out.println("Structure:"+ddmStructure);

DLFileEntryMetadata fileEntryMetadata = DLFileEntryMetadataLocalServiceUtil.getFileEntryMetadata(ddmStructure.getStructureId(), fileVersionId);

fields = StorageEngineUtil.getFields(fileEntryMetadata.getDDMStorageId());


In my code When I upload 3 files , I retrieve DDMStructures for all files

But after that I have receive Metadata and Fields for 2 files
But Fields for the Last one cannot be retrieved
If I have made any errors in my code or any other possible solutions please let me concern

Thank you