Merge pull request #1230 from beqjanus/StopVoCacheTPHangs

Stop vo cache related tp hangs

4 files changed, 199 insertions, 59 deletions

diff --git a/indra/newview/llgltfmateriallist.cpp b/indra/newview/llgltfmateriallist.cpp
index f07ea7ee4f..e97eb552cf 100644
--- a/indra/newview/llgltfmateriallist.cpp
+++ b/indra/newview/llgltfmateriallist.cpp
@@ -244,7 +244,12 @@ void LLGLTFMaterialList::applyOverrideMessage(LLMessageSystem* msg, const std::s
                 }
             }
 
-            region->cacheFullUpdateGLTFOverride(cache);
+            // Workaround for server sending empty overrides.
+            if(cache.mSides.size() > 0)
+            {
+                region->cacheFullUpdateGLTFOverride(cache);
+                LL_DEBUGS("GLTF") << "GLTF Material Override: " << cache.mObjectId << " " << cache.mLocalId << " " << cache.mRegionHandle << " (sides:" << (cache.mSides.size()) << ")" << LL_ENDL;
+            }
         }
 
     }
diff --git a/indra/newview/llviewerregion.cpp b/indra/newview/llviewerregion.cpp
index d51e8a49e6..160e2f7e5c 100755
--- a/indra/newview/llviewerregion.cpp
+++ b/indra/newview/llviewerregion.cpp
@@ -794,8 +794,9 @@ void LLViewerRegion::loadObjectCache()
 	if(LLVOCache::instanceExists())
 	{
         LLVOCache & vocache = LLVOCache::instance();
-		vocache.readFromCache(mHandle, mImpl->mCacheID, mImpl->mCacheMap);
-        vocache.readGenericExtrasFromCache(mHandle, mImpl->mCacheID, mImpl->mGLTFOverridesLLSD);
+		// Without this a "corrupted" vocache persists until a cache clear or other rewrite. Mark as dirty hereif read fails to force a rewrite.
+		mCacheDirty = !vocache.readFromCache(mHandle, mImpl->mCacheID, mImpl->mCacheMap);
+		vocache.readGenericExtrasFromCache(mHandle, mImpl->mCacheID, mImpl->mGLTFOverridesLLSD, mImpl->mCacheMap);
 
 		if (mImpl->mCacheMap.empty())
 		{
@@ -1167,13 +1168,13 @@ void LLViewerRegion::killCacheEntry(LLVOCacheEntry* entry, bool for_rendering)
 			child = entry->getChild();
 		}
 	}
-
+	// Kill the assocaited overrides
+	mImpl->mGLTFOverridesLLSD.erase(entry->getLocalID());
 	//will remove it from the object cache, real deletion
 	entry->setState(LLVOCacheEntry::INACTIVE);
 	entry->removeOctreeEntry();
 	entry->setValid(FALSE);
 
-	// TODO kill extras/material overrides cache too
 }
 
 //physically delete the cache entry	
@@ -3743,6 +3744,11 @@ void LLViewerRegion::applyCacheMiscExtras(LLViewerObject* obj)
     auto iter = mImpl->mGLTFOverridesLLSD.find(local_id);
     if (iter != mImpl->mGLTFOverridesLLSD.end())
     {
+        // UUID can be inserted null, so backfill the UUID if it was left empty
+        if (iter->second.mObjectId.isNull())
+        {
+            iter->second.mObjectId = obj->getID();
+        }
         llassert(iter->second.mGLTFMaterial.size() == iter->second.mSides.size());
 
         for (auto& side : iter->second.mGLTFMaterial)
diff --git a/indra/newview/llvocache.cpp b/indra/newview/llvocache.cpp
index dd5b9f9fd5..82ffd1d522 100644
--- a/indra/newview/llvocache.cpp
+++ b/indra/newview/llvocache.cpp
@@ -33,7 +33,7 @@
 #include "llviewerregion.h"
 #include "llagentcamera.h"
 #include "llsdserialize.h"
-
+#include "llworld.h" // For LLWorld::getInstance()
 //static variables
 U32 LLVOCacheEntry::sMinFrameRange = 0;
 F32 LLVOCacheEntry::sNearRadius = 1.0f;
@@ -55,6 +55,10 @@ BOOL check_write(LLAPRFile* apr_file, void* src, S32 n_bytes)
 	return apr_file->write(src, n_bytes) == n_bytes ;
 }
 
+// Material Override Cache needs a version label, so we can upgrade this later.
+const std::string LLGLTFOverrideCacheEntry::VERSION_LABEL = {"GLTFCacheVer"};
+const int LLGLTFOverrideCacheEntry::VERSION = 1;
+
 bool LLGLTFOverrideCacheEntry::fromLLSD(const LLSD& data)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_NETWORK;
@@ -235,6 +239,8 @@ LLVOCacheEntry::LLVOCacheEntry(LLAPRFile* apr_file)
 		}
 		else
 		{
+			// Improve logging around vocache
+			LL_WARNS() << "Error loading cache entry for " << mLocalID << ", size " << size << " aborting!" << LL_ENDL;
 			delete[] mBuffer ;
 			mBuffer = NULL ;
 		}
@@ -1261,6 +1267,10 @@ void LLVOCache::removeEntry(HeaderEntryInfo* entry)
 	{
 		return;
 	}
+	// Bit more tracking of cache creation/destruction.
+	std::string filename;
+	getObjectCacheFilename(entry->mHandle, filename);
+	LL_INFOS() << "Removing entry for region with filename" << filename << LL_ENDL;
 
 	header_entry_queue_t::iterator iter = mHeaderEntryQueue.find(entry);
 	if(iter != mHeaderEntryQueue.end())
@@ -1331,6 +1341,10 @@ void LLVOCache::removeFromCache(HeaderEntryInfo* entry)
 	std::string filename;
 	getObjectCacheFilename(entry->mHandle, filename);
 	LLAPRFile::remove(filename, mLocalAPRFilePoolp);
+	// Note: `removeFromCache` should take responsibility for cleaning up all cache artefacts specfic to the handle/entry.
+	// as such this now includes the generic extras
+	removeGenericExtrasForHandle(entry->mHandle);
+
 	entry->mTime = INVALID_TIME ;
 	updateEntry(entry) ; //update the head file.
 }
@@ -1478,12 +1492,14 @@ BOOL LLVOCache::updateEntry(const HeaderEntryInfo* entry)
 	return check_write(&apr_file, (void*)entry, sizeof(HeaderEntryInfo)) ;
 }
 
-void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_entry_map_t& cache_entry_map) 
+// we now return bool to trigger dirty cache
+// this in turn forces a rewrite after a partial read due to corruption.
+bool LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_entry_map_t& cache_entry_map) 
 {
 	if(!mEnabled)
 	{
 		LL_WARNS() << "Not reading cache for handle " << handle << "): Cache is currently disabled." << LL_ENDL;
-		return ;
+		return true; // no problem we're just read only
 	}
 	llassert_always(mInitialized);
 
@@ -1491,12 +1507,13 @@ void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::voca
 	if(iter == mHandleEntryMap.end()) //no cache
 	{
 		LL_WARNS() << "No handle map entry for " << handle << LL_ENDL;
-		return ;
+		return false; // arguably no a problem, but we'll mark this as dirty anyway.
 	}
 
 	bool success = true ;
+	S32 num_entries = 0 ; // lifted out of inner loop. 
+	std::string filename; // lifted out of loop
 	{
-		std::string filename;
 		LLUUID cache_id;
 		getObjectCacheFilename(handle, filename);
 		LLAPRFile apr_file(filename, APR_READ|APR_BINARY, mLocalAPRFilePoolp);
@@ -1513,7 +1530,6 @@ void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::voca
 
 			if(success)
 			{
-				S32 num_entries;  // if removal was enabled during write num_entries might be wrong
 				success = check_read(&apr_file, &num_entries, sizeof(S32)) ;
 	
 				if(success)
@@ -1542,11 +1558,17 @@ void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::voca
 		}
 	}
 
-	return ;
+	LL_DEBUGS("GLTF", "VOCache") << "Read " << cache_entry_map.size() << " entries from object cache " << filename << ", expected " << num_entries << ", success=" << (success?"True":"False") << LL_ENDL;
+	return success;
 }
 
-void LLVOCache::readGenericExtrasFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_gltf_overrides_map_t& cache_extras_entry_map)
+// We now pass in the cache entry map, so that we can remove entries from extras that are no longer in the primary cache.
+void LLVOCache::readGenericExtrasFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_gltf_overrides_map_t& cache_extras_entry_map, const LLVOCacheEntry::vocache_entry_map_t& cache_entry_map)
 {
+    int loaded= 0;
+    int discarded = 0;
+    // get ViewerRegion pointer from handle
+    LLViewerRegion* pRegion = LLWorld::getInstance()->getRegionFromHandle(handle);
     if(!mEnabled)
     {
         LL_WARNS() << "Not reading cache for handle " << handle << "): Cache is currently disabled." << LL_ENDL;
@@ -1566,40 +1588,73 @@ void LLVOCache::readGenericExtrasFromCache(U64 handle, const LLUUID& id, LLVOCac
 
     std::string line;
     std::getline(in, line);
-    if(!in.good()) {
+    if(!in.good()) 
+    {
         LL_WARNS() << "Failed reading extras cache for handle " << handle << LL_ENDL;
+        in.close();
+        removeGenericExtrasForHandle(handle);
         return;
     }
+    // file formats need versions, let's add one. legacy cache files will be considered version 0
+    // This will make it easier to upgrade/revise later.
+    int versionNumber=0;
+    if (line.compare(0, LLGLTFOverrideCacheEntry::VERSION_LABEL.length(), LLGLTFOverrideCacheEntry::VERSION_LABEL) == 0) 
+    {
+        std::string versionStr = line.substr(LLGLTFOverrideCacheEntry::VERSION_LABEL.length()+1); // skip the version label and ':'
+        versionNumber = std::stol(versionStr);
+    }
+    // For future versions we may call a legacy handler here, but realistically we'll just consider this cache out of date.
+    // The important thing is to make sure it gets removed.
+    if(versionNumber != LLGLTFOverrideCacheEntry::VERSION && versionNumber != 0)
+    {
+        LL_WARNS() << "Unexpected version number " << versionNumber << " for extras cache for handle " << handle << LL_ENDL;
+        in.close();
+        removeGenericExtrasForHandle(handle);
+        return;
+    }
+
+    LL_DEBUGS("VOCache") << "Reading extras cache for handle " << handle << ", version " << versionNumber << LL_ENDL;
 
     if(!LLUUID::validate(line))
     {
         LL_WARNS() << "Failed reading extras cache for handle" << handle << ". invalid uuid line: '" << line << "'" << LL_ENDL;
+        in.close();
+        removeGenericExtrasForHandle(handle);
         return;
     }
 
     LLUUID cache_id(line);
     if(cache_id != id)
     {
-        LL_INFOS() << "Cache ID doesn't match for this region, discarding" << LL_ENDL;
+        // if the cache id doesn't match the expected region we should just kill the file.
+        LL_WARNS() << "Cache ID doesn't match for this region, deleting it" << LL_ENDL;
+        in.close();
+        removeGenericExtrasForHandle(handle);
         return;
     }
 
     U32 num_entries;  // if removal was enabled during write num_entries might be wrong
     std::getline(in, line);
-    if(!in.good()) {
+    if(!in.good()) 
+    {
         LL_WARNS() << "Failed reading extras cache for handle " << handle << LL_ENDL;
+        in.close();
+        removeGenericExtrasForHandle(handle);
         return;
     }
-    try {
+    try 
+    {
         num_entries = std::stol(line);
     }
     catch(std::logic_error&)  // either invalid_argument or out_of_range
     {
         LL_WARNS() << "Failed reading extras cache for handle " << handle << ". unreadable num_entries" << LL_ENDL;
+        in.close();
+        removeGenericExtrasForHandle(handle);
         return;
     }
 
-    LL_DEBUGS("GLTF") << "Beginning reading extras cache for handle " << handle << ", " << num_entries << " entries" << LL_ENDL;
+    LL_DEBUGS("GLTF") << "Beginning reading extras cache for handle " << handle << " from " << getObjectCacheExtrasFilename(handle) << LL_ENDL;
 
     LLSD entry_llsd;
     for (U32 i = 0; i < num_entries && !in.eof(); i++)
@@ -1607,47 +1662,66 @@ void LLVOCache::readGenericExtrasFromCache(U64 handle, const LLUUID& id, LLVOCac
         static const U32 max_size = 4096;
         bool success = LLSDSerialize::deserialize(entry_llsd, in, max_size);
         // check bool(in) this time since eof is not a failure condition here
-        if(!success || !in) {
-            LL_WARNS() << "Failed reading extras cache for handle " << handle << ", entry number " << i << LL_ENDL;
-            return;
+        if(!success || !in) 
+        {
+            LL_WARNS() << "Failed reading extras cache for handle " << handle << ", entry number " << i << " cache patrtial load only." << LL_ENDL;
+            in.close();
+            removeGenericExtrasForHandle(handle);
+            break;
         }
 
         LLGLTFOverrideCacheEntry entry;
         entry.fromLLSD(entry_llsd);
         U32 local_id = entry_llsd["local_id"].asInteger();
-        cache_extras_entry_map[local_id] = entry;
+        // only add entries that exist in the primary cache
+        // this is a self-healing test that avoids us polluting the cache with entries that are no longer valid based on the main cache.
+        if(cache_entry_map.find(local_id)!= cache_entry_map.end())
+        {
+            // attempt to backfill a null objectId, though these shouldn't be in the persisted cache really
+            if(entry.mObjectId.isNull() && pRegion)
+            {
+                gObjectList.getUUIDFromLocal( entry.mObjectId, local_id, pRegion->getHost().getAddress(), pRegion->getHost().getPort() );
+            }
+            cache_extras_entry_map[local_id] = entry;
+            loaded++;
+        }
+        else
+        {
+            discarded++;
+        }
     }
-
-    LL_DEBUGS("GLTF") << "Completed reading extras cache for handle " << handle << ", " << num_entries << " entries" << LL_ENDL;
+    LL_DEBUGS("GLTF") << "Completed reading extras cache for handle " << handle << ", " << loaded << " loaded, " << discarded << " discarded" << LL_ENDL;
 }
 
 void LLVOCache::purgeEntries(U32 size)
 {
+	LL_DEBUGS("VOCache","GLTF") << "Purging " << size << " entries from cache" << LL_ENDL;
 	while(mHeaderEntryQueue.size() > size)
 	{
 		header_entry_queue_t::iterator iter = mHeaderEntryQueue.begin() ;
-		HeaderEntryInfo* entry = *iter ;			
-		mHandleEntryMap.erase(entry->mHandle);
+		HeaderEntryInfo* entry = *iter ;
+		mHandleEntryMap.erase(entry->mHandle) ;
 		mHeaderEntryQueue.erase(iter) ;
-		removeFromCache(entry) ;
+		removeFromCache(entry) ; // This now handles removing extras cache where appropriate.
 		delete entry;
-        // TODO also delete extras
 	}
 	mNumEntries = mHandleEntryMap.size() ;
 }
 
 void LLVOCache::writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry::vocache_entry_map_t& cache_entry_map, BOOL dirty_cache, bool removal_enabled) 
 {
+	std::string filename;
+	getObjectCacheFilename(handle, filename);
 	if(!mEnabled)
 	{
-		LL_WARNS() << "Not writing cache for handle " << handle << "): Cache is currently disabled." << LL_ENDL;
+		LL_WARNS() << "Not writing cache for " << filename << " (handle:" << handle << "): Cache is currently disabled." << LL_ENDL;
 		return ;
 	}
 	llassert_always(mInitialized);
 
 	if(mReadOnly)
 	{
-		LL_WARNS() << "Not writing cache for handle " << handle << "): Cache is currently in read-only mode." << LL_ENDL;
+		LL_WARNS() << "Not writing cache for " << filename << " (handle:" << handle << "): Cache is currently in read-only mode." << LL_ENDL;
 		return ;
 	}	
 
@@ -1682,13 +1756,13 @@ void LLVOCache::writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry:
 	//update cache header
 	if(!updateEntry(entry))
 	{
-		LL_WARNS() << "Failed to update cache header index " << entry->mIndex << ". handle = " << handle << LL_ENDL;
+		LL_WARNS() << "Failed to update cache header index " << entry->mIndex << ". " << filename << " handle = " << handle << LL_ENDL;
 		return ; //update failed.
 	}
 
 	if(!dirty_cache)
 	{
-		LL_WARNS() << "Skipping write to cache for handle " << handle << ": cache not dirty" << LL_ENDL;
+		LL_WARNS() << "Skipping write to cache for " << filename << " (handle:" << handle << "): cache not dirty" << LL_ENDL;
 		return ; //nothing changed, no need to update.
 	}
 
@@ -1724,6 +1798,7 @@ void LLVOCache::writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry:
                         }
                         else
                         {
+                            LL_WARNS() << "Failed to write cache entry to buffer for " << filename << ", entry number " << iter->second->getLocalID() << LL_ENDL;
                             success = false;
                             break;
                         }
@@ -1735,6 +1810,7 @@ void LLVOCache::writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry:
                             size_in_buffer = 0;
                             if (!success)
                             {
+                                LL_WARNS() << "Failed to write cache to disk " << filename << LL_ENDL;
                                 break;
                             }
                         }
@@ -1745,8 +1821,13 @@ void LLVOCache::writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry:
                 {
                     // final write
                     success = check_write(&apr_file, (void*)data_buffer, size_in_buffer);
+                    if(!success)
+                    {
+                        LL_WARNS() << "Failed to write cache entry to disk " << filename << LL_ENDL;
+                    }
                     size_in_buffer = 0;
                 }
+                LL_DEBUGS("VOCache") << "Wrote " << num_entries << " entries to the primary VOCache file " << filename << ". success = " << (success ? "True":"False") << LL_ENDL;
             }
 		}
 	}
@@ -1759,6 +1840,17 @@ void LLVOCache::writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry:
 	return ;
 }
 
+void LLVOCache::removeGenericExtrasForHandle(U64 handle)
+{
+    if(mReadOnly)
+    {
+        LL_WARNS() << "Not removing cache for handle " << handle << ": Cache is currently in read-only mode." << LL_ENDL;
+        return ;
+    }
+    LL_WARNS("GLTF", "VOCache") << "Removing generic extras for handle " << handle << "Filename: " << getObjectCacheExtrasFilename(handle) << LL_ENDL;
+    LLFile::remove(getObjectCacheExtrasFilename(handle));
+}
+
 void LLVOCache::writeGenericExtrasToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry::vocache_gltf_overrides_map_t& cache_extras_entry_map, BOOL dirty_cache, bool removal_enabled)
 {
     if(!mEnabled)
@@ -1774,46 +1866,86 @@ void LLVOCache::writeGenericExtrasToCache(U64 handle, const LLUUID& id, const LL
         return;
     }
 
-    std::string filename(getObjectCacheExtrasFilename(handle));
+    // <FS:Beq> FIRE-33808 - Material Override Cache causes long delays
+    std::string filename = getObjectCacheExtrasFilename(handle);
+    // </FS:Beq>
     llofstream out(filename, std::ios::out | std::ios::binary);
     if(!out.good())
     {
         LL_WARNS() << "Failed writing extras cache for handle " << handle << LL_ENDL;
+        removeGenericExtrasForHandle(handle);
         return;
-        // TODO - clean up broken cache file
     }
+    // It is good practice to version file formats so let's add one.
+    // legacy versions will be treated as version 0.
+    out << LLGLTFOverrideCacheEntry::VERSION_LABEL << ":" << LLGLTFOverrideCacheEntry::VERSION << '\n';
 
     out << id << '\n';
     if(!out.good())
     {
         LL_WARNS() << "Failed writing extras cache for handle " << handle << LL_ENDL;
+        removeGenericExtrasForHandle(handle); 
         return;
-        // TODO - clean up broken cache file
     }
-
-    U32 num_entries = cache_extras_entry_map.size();
-    out << num_entries << '\n';
+	// Because we don't write out all the entries we need to record a placeholder and rewrite this later
+    auto num_entries_placeholder = out.tellp();
+    out << std::setw(10) << std::setfill('0') << 0 << '\n';
     if(!out.good())
     {
         LL_WARNS() << "Failed writing extras cache for handle " << handle << LL_ENDL;
+        removeGenericExtrasForHandle(handle); 
         return;
-        // TODO - clean up broken cache file
     }
 
-    for (auto const & entry : cache_extras_entry_map)
+    // get ViewerRegion pointer from handle
+    LLViewerRegion* pRegion = LLWorld::getInstance()->getRegionFromHandle(handle);
+
+    U32 num_entries = 0;
+    U32 inmem_entries = 0;
+    U32 skipped = 0;
+    inmem_entries = cache_extras_entry_map.size();
+    for (auto [local_id, entry] : cache_extras_entry_map)
     {
-        S32 local_id = entry.first;
-        LLSD entry_llsd = entry.second.toLLSD();
-        entry_llsd["local_id"] = local_id;
-        LLSDSerialize::serialize(entry_llsd, out, LLSDSerialize::LLSD_XML);
-        out << '\n';
-        if(!out.good())
+        // Only write out GLTFOverrides that we can actually apply again on import.
+        // worst case we have an extra cache miss.
+        // Note: A null mObjectId is valid when in memory as we might have a data race between GLTF of the object itself.
+        // This remains a valid state to persist as it is consistent with the localid checks on import with the main cache.
+		// the mObjectId will be updated if/when the local object is updated from the gObject list (due to full update)
+        if(entry.mObjectId.isNull() && pRegion)
         {
-            LL_WARNS() << "Failed writing extras cache for handle " << handle << LL_ENDL;
-            return;
-            // TODO - clean up broken cache file
+            gObjectList.getUUIDFromLocal( entry.mObjectId, local_id, pRegion->getHost().getAddress(), pRegion->getHost().getPort() );
         }
-    }
 
-    LL_DEBUGS("GLTF") << "Completed writing extras cache for handle " << handle << ", " << num_entries << " entries" << LL_ENDL;
+        if( entry.mSides.size() > 0 &&
+            entry.mSides.size() == entry.mGLTFMaterial.size()
+          )
+        {
+            LLSD entry_llsd = entry.toLLSD();
+            entry_llsd["local_id"] = (S32)local_id;
+            LLSDSerialize::serialize(entry_llsd, out, LLSDSerialize::LLSD_XML);
+            out << '\n';
+            if(!out.good())
+            {
+                // We're not in a good place when this happens so we might as well nuke the file.
+                LL_WARNS() << "Failed writing extras cache for handle " << handle << ". Corrupted cache file " << filename << " removed." << LL_ENDL;
+                removeGenericExtrasForHandle(handle);
+                return;
+            }
+            num_entries++;
+        }
+        else
+        {
+            skipped++;
+        }
+    }
+    // Rewrite the placeholder
+    out.seekp(num_entries_placeholder);
+    out << std::setw(10) << std::setfill('0') << num_entries << '\n';
+    if(!out.good())
+    {
+        LL_WARNS() << "Failed writing extras cache for handle " << handle << LL_ENDL;
+        removeGenericExtrasForHandle(handle);
+        return;
+    }
+    LL_DEBUGS("GLTF") << "Completed writing extras cache for handle " << handle << ", " << num_entries << " entries. Total in RAM: " << inmem_entries << " skipped (no persist): " << skipped << LL_ENDL;
 }
diff --git a/indra/newview/llvocache.h b/indra/newview/llvocache.h
index 8525edd121..d94e79ce1b 100644
--- a/indra/newview/llvocache.h
+++ b/indra/newview/llvocache.h
@@ -43,6 +43,8 @@ class LLCamera;
 class LLGLTFOverrideCacheEntry
 {
 public:
+    static const std::string VERSION_LABEL;
+    static const int VERSION;
     bool fromLLSD(const LLSD& data);
     LLSD toLLSD() const;
 
@@ -96,12 +98,6 @@ public:
 		}
 	};
 
-    struct ExtrasEntry
-    {
-        LLSD extras;
-        std::string extras_raw;
-    };
-
 protected:
 	~LLVOCacheEntry();
 public:
@@ -289,12 +285,13 @@ public:
 	void initCache(ELLPath location, U32 size, U32 cache_version);
 	void removeCache(ELLPath location, bool started = false) ;
 
-	void readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_entry_map_t& cache_entry_map) ;
-    void readGenericExtrasFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_gltf_overrides_map_t& cache_extras_entry_map);
+	bool readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_entry_map_t& cache_entry_map) ;
+	void readGenericExtrasFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_gltf_overrides_map_t& cache_extras_entry_map, const LLVOCacheEntry::vocache_entry_map_t& cache_entry_map);
 
 	void writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry::vocache_entry_map_t& cache_entry_map, BOOL dirty_cache, bool removal_enabled);
     void writeGenericExtrasToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry::vocache_gltf_overrides_map_t& cache_extras_entry_map, BOOL dirty_cache, bool removal_enabled);
 	void removeEntry(U64 handle) ;
+	void removeGenericExtrasForHandle(U64 handle);
 
 	U32 getCacheEntries() { return mNumEntries; }
 	U32 getCacheEntriesMax() { return mCacheSize; }