Instead of lengthy blurbs, switch to single-line, machine-readable
standardized (https://spdx.dev) license identifiers. The Linux kernel
switched long ago, so there is strong precedent.
Three cases are handled: AGPL-only, Apache-only, and dual licensed.
For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0),
reasoning that our changes are extensive enough to apply our license.
The changes we applied mechanically with a script, except to
licenses/README.md.
Closes#9937
This patch adds all functionality needed for Paxos protocol. The
implementation does not strictly adhere to Paxos paper since the original
paper allows setting a value only once, while for LWT we need to be able
to make another Paxos round after "learn" phase completes, which requires
things like repair to be introduced.
The handler is intended to be called when internal invariants are
violated and the operation cannot safely continue. The handler either
throws (default) or aborts, depending on configuration option.
Passing --abort-on-internal-error on the command line will switch to
aborting.
The reason we don't abort by default is that it may bring the whole
cluster down and cause unavailability, while it may not be necessary
to do so. It's safer to fail just the affected operation,
e.g. repair. However, failing the operation with an exception leaves
little information for debugging the root cause. So the idea is that the
user would enable aborts on only one of the nodes in the cluster to
get a core dump and not bring the whole cluster down.
Make storage_io_exception exception error message less cryptic by
actually including the human-readable error message from
std::system_error...
Before:
nodetool: Scylla API server HTTP POST to URL '/storage_service/snapshots' failed: Storage io error errno: 2
After:
nodetool: Scylla API server HTTP POST to URL '/storage_service/snapshots' failed: Storage I/O error: 2: No such file or directory
We can improve this further by including the name of the file that the I/O
error happened on.
Message-Id: <1465452061-15474-1-git-send-email-penberg@scylladb.com>
