Changes:
- In route definition, the I operator is replaced with D. Existing programs
must be updated to prevent warning from being printed. - Changed signatures for processor functions by adding a new last argument
'method'. Existing scripts MAY BREAK and should be updated. Refer to
the rrr.conf.5 manual page for correct function signatures. - Set process and thread names on OS-es where this is possible. This can
assist when debugging for instance CPU usage.
Features:
- Match generated messages in httpclient with their corresponding message triggering the query by using a report tag
- Route messages leaving an instance to specific reader instances by topic or array tags
- New parameter in httpclient to control timeout of low priority messages specifically
- New array value "hdlc" for parsing HDLC messages
- Ability in file module to write to files and devices among other new configuration parameters
- New conversion type "hchar2str" in mangler module to convert individual bytes to strings
- New OS object in javascript (operating-system) and ability to obtain hostname
- New ModBus TCP module
- New Lua module
- New method on Message object in JS push_tag_object which serializes objects into JSON. Receiving JS instances will automatically de-serialize the JSON added to messages this way.
- New parameter methods for cmodules (python3, js, perl5, lua and cmodule) allowing messages content to be identified before being processed. The processor function receives a method name.
- Support PATCH requests in httpclient and httpserver
- New function console.assert in JS
- Hook messages between modules and dump them using rrr_stats
- Hook events and show them using rrr_stats
- Set mode on file which are written by the file module
- Incrementer can use prefixes ORed with incremented ID
- Dump memory profiling using functionallity provided by jemalloc
Improvements:
- Timeout changes in httpclient and rotate deferred to msgdb PUT messages to ensure all are attempted and not the same messages time out repeatedly.
- In JS, refuse bare name module imports (require prefix like ./) and process relative paths correctly with respect to directory of importing script.
- In httpclient, print stats about dropped messages in periodic function instead of once for every message.
- Add warning when buffer entry count exceeds a certain configurable limit
- Add statistics data for message broker costumer buffers
- Print warning and disallow requests in HTTP-client if the endpoints has invalid characters.
Fixes:
- Raw data messages in JS module now working properly
- Crash in JS module upon GC due to null pointer access
- Httpclient sometimes spinning on CPU indefinitely after handshaking if there is no data to send on a socket.
- Readers were blocked in message broker when writer used do_again during slot write (fast writes from dummy module with buffer=no).
- Deadlock in rrr_stats due to printing messages during signal handling
- Soft error was ignored in socket client collection also when socket surely was closed, like when 0 bytes were read. This caused the socket not to be closed with following CPU spin due do constant POLLIN event. The soft error is now forced to propagate if bytes read is zero so that only data errors are ignored (which is also intention of higher levels).
- Connections were closed in IP module when byte by byte sync was used and the alignment used up all remaining buffered bytes.
- Non-working default socket name in msgdb module causing crash
- Incorrect tick timer in msgdb causing excessive CPU usage
- Memory leak of HV in Perl subroutine call helper function
- Stale connections in http-client when server accepts connections but does not respond
- Discrepancies in httpserver with respect to timeout and response when waiting for responses from sender modules.
- Incorrect header name for access-control-allow-methods in httpserver
Under the hood:
- Use events in file module
- Common send loop for file and ip modules