Handle OOM and OOD more gracefully to not spam Sentry with error reports (#434)

- Improvement: Catch Out Of Memory and Out Of Disk exceptions and report back to reqeuster without reporting an error to Sentry
- Improvement: If creating bucket fails when storing and item in the structured cache, log a warning and propagate error to requester without reporting an error to Sentry
- Improvement: Make an explicit flush of the active block written to in blockstore flush
- Improvement: Make sure cache and cas MakeIndexSnapshot does not throw exception on failure which would cause and abnormal termniation at exit

1 files changed, 3 insertions, 0 deletions

diff --git a/src/zencore/include/zencore/except.h b/src/zencore/include/zencore/except.h
index 464852f88..6810e6ea9 100644
--- a/src/zencore/include/zencore/except.h
+++ b/src/zencore/include/zencore/except.h
@@ -66,4 +66,7 @@ public:
 	inline explicit OptionParseException(const std::string& Message) : std::runtime_error(Message) {}
 };
 
+bool IsOOM(const std::system_error& SystemError);
+bool IsOOD(const std::system_error& SystemError);
+
 }  // namespace zen