Logparser

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Logparser provides a machine learning toolkit and benchmarks for automated log parsing, which is a crucial step for structured log analytics. By applying logparser, users can automatically extract event templates from unstructured logs and convert raw log messages into a sequence of structured events. The process of log parsing is also known as message template extraction, log key extraction, or log message clustering in the literature.

An example of log parsing

🌈 New updates

• Since the first release of logparser, many PRs and issues have been submitted due to incompatibility with Python 3. Finally, we update logparser v1.0.0 with support for Python 3. Thanks for all the contributions (#PR86, #PR85, #PR83, #PR80, #PR65, #PR57, #PR53, #PR52, #PR51, #PR49, #PR18, #PR22)!
• We build the package wheel logparser3 and release it on pypi. Please install via pip install logparser3.
• We refactor the code structure and beautify the code via the Python code formatter black.

Log parsers available:

Publication	Parser	Paper Title	Benchmark
IPOM'03	SLCT	A Data Clustering Algorithm for Mining Patterns from Event Logs, by Risto Vaarandi.	:arrow_upper_right:
QSIC'08	AEL	Abstracting Execution Logs to Execution Events for Enterprise Applications, by Zhen Ming Jiang, Ahmed E. Hassan, Parminder Flora, Gilbert Hamann.	:arrow_upper_right:
KDD'09	IPLoM	Clustering Event Logs Using Iterative Partitioning, by Adetokunbo Makanju, A. Nur Zincir-Heywood, Evangelos E. Milios.	:arrow_upper_right:
ICDM'09	LKE	Execution Anomaly Detection in Distributed Systems through Unstructured Log Analysis, by Qiang Fu, Jian-Guang Lou, Yi Wang, Jiang Li. [Microsoft]	:arrow_upper_right:
MSR'10	LFA	Abstracting Log Lines to Log Event Types for Mining Software System Logs, by Meiyappan Nagappan, Mladen A. Vouk.	:arrow_upper_right:
CIKM'11	LogSig	LogSig: Generating System Events from Raw Textual Logs, by Liang Tang, Tao Li, Chang-Shing Perng.	:arrow_upper_right:
SCC'13	SHISO	Incremental Mining of System Log Format, by Masayoshi Mizutani.	:arrow_upper_right:
CNSM'15	LogCluster	LogCluster - A Data Clustering and Pattern Mining Algorithm for Event Logs, by Risto Vaarandi, Mauno Pihelgas.	:arrow_upper_right:
CNSM'15	LenMa	Length Matters: Clustering System Log Messages using Length of Words, by Keiichi Shima.	:arrow_upper_right:
CIKM'16	LogMine	LogMine: Fast Pattern Recognition for Log Analytics, by Hossein Hamooni, Biplob Debnath, Jianwu Xu, Hui Zhang, Geoff Jiang, Adbullah Mueen. [NEC]	:arrow_upper_right:
ICDM'16	Spell	Spell: Streaming Parsing of System Event Logs, by Min Du, Feifei Li.	:arrow_upper_right:
ICWS'17	Drain	Drain: An Online Log Parsing Approach with Fixed Depth Tree, by Pinjia He, Jieming Zhu, Zibin Zheng, and Michael R. Lyu.	:arrow_upper_right:
ICPC'18	MoLFI	A Search-based Approach for Accurate Identification of Log Message Formats, by Salma Messaoudi, Annibale Panichella, Domenico Bianculli, Lionel Briand, Raimondas Sasnauskas.	:arrow_upper_right:
TSE'20	Logram	Logram: Efficient Log Parsing Using n-Gram Dictionaries, by Hetong Dai, Heng Li, Che-Shao Chen, Weiyi Shang, and Tse-Hsun (Peter) Chen.	:arrow_upper_right:
ECML-PKDD'20	NuLog	Self-Supervised Log Parsing, by Sasho Nedelkoski, Jasmin Bogatinovski, Alexander Acker, Jorge Cardoso, Odej Kao.	:arrow_upper_right:
ICSME'22	ULP	An Effective Approach for Parsing Large Log Files, by Issam Sedki, Abdelwahab Hamou-Lhadj, Otmane Ait-Mohamed, Mohammed A. Shehab.	:arrow_upper_right:
TSC'23	Brain	Brain: Log Parsing with Bidirectional Parallel Tree, by Siyu Yu, Pinjia He, Ningjiang Chen, Yifan Wu.	:arrow_upper_right:
ICSE'24	DivLog	DivLog: Log Parsing with Prompt Enhanced In-Context Learning, by Junjielong Xu, Ruichun Yang, Yintong Huo, Chengyu Zhang, and Pinjia He.	:arrow_upper_right:

:bulb: Welcome to submit a PR to push your parser code to logparser and add your paper to the table.

Installation

We recommend installing the logparser package and requirements via pip install.

pip install logparser3

In particular, the package depends on the following requirements. Note that regex matching in Python is brittle, so we recommend fixing the regex library to version 2022.3.2.

Note: If you encouter "Error: need to escape...", please follow the instructions here.

• python 3.6+
• regex 2022.3.2
• numpy
• pandas
• scipy
• scikit-learn

Conditional requirements:

• If using MoLFI: deap
• If using SHISO: nltk
• If using SLCT: gcc
• If using LogCluster: perl
• If using NuLog: torch, torchvision, keras_preprocessing
• If using DivLog: openai, tiktoken (require python 3.8+)

Get started

1. Run the demo:

   For each log parser, we provide a demo to help you get started. Each demo shows the basic usage of a target log parser and the hyper-parameters to configure. For example, the following command shows how to run the demo for Drain.

   cd logparser/Drain
   python demo.py
   

2. Run the benchmark:

   For each log parser, we provide a benchmark script to run log parsing on the loghub_2k datasets for evaluating parsing accuarcy. You can also use other benchmark datasets for log parsing.

   cd logparser/Drain 
   python benchmark.py
   

   The benchmarking results can be found at the readme file of each parser, e.g., https://github.com/logpai/logparser/tree/main/logparser/Drain#benchmark.

3. Parse your own logs:

   It is easy to apply logparser to parsing your own log data. To do so, you need to install the logparser3 package first. Then you can develop your own script following the below code snippet to start log parsing. See the full example code at example/parse_your_own_logs.py.

   from logparser.Drain import LogParser
   
   input_dir = 'PATH_TO_LOGS/' # The input directory of log file
   output_dir = 'result/'  # The output directory of parsing results
   log_file = 'unknow.log'  # The input log file name
   log_format = '<Date> <Time> <Level>:<Content>' # Define log format to split message fields
   # Regular expression list for optional preprocessing (default: [])
   regex = [
       r'(/|)([0-9]+\.){3}[0-9]+(:[0-9]+|)(:|)' # IP
   ]
   st = 0.5  # Similarity threshold
   depth = 4  # Depth of all leaf nodes
   
   parser = LogParser(log_format, indir=input_dir, outdir=output_dir,  depth=depth, st=st, rex=regex)
   parser.parse(log_file)
   

   After running logparser, you can obtain extracted event templates and parsed structured logs in the output folder.

   • *_templates.csv (See example HDFS_2k.log_templates.csv)

     EventId	EventTemplate	Occurrences
     dc2c74b7	PacketResponder <> for block <> terminating	311
     e3df2680	Received block <> of size <> from <*>	292
     09a53393	Receiving block <> src: <> dest: <*>	292

   • *_structured.csv (See example HDFS_2k.log_structured.csv)

     ...	Level	Content	EventId	EventTemplate	ParameterList
     ...	INFO	PacketResponder 1 for block blk_38865049064139660 terminating	dc2c74b7	PacketResponder <> for block <> terminating	['1', 'blk_38865049064139660']
     ...	INFO	Received block blk_3587508140051953248 of size 67108864 from /10.251.42.84	e3df2680	Received block <> of size <> from <*>	['blk_3587508140051953248', '67108864', '/10.251.42.84']
     ...	INFO	Verification succeeded for blk_-4980916519894289629	32777b38	Verification succeeded for <*>	['blk_-4980916519894289629']

Production use

The main goal of logparser is used for research and benchmark purpose. Researchers can use logparser as a code base to develop new log parsers while practitioners could assess the performance and scalability of current log parsing methods through our benchmarking. We strongly recommend practitioners to try logparser in your production environment. But be aware that the current implementation of logparser is far from ready for production use. Whereas we currently have no plan to do that, we do have a few suggestions for developers who want to build an intelligent production-level log parser.

• Please be aware of the licenses of third-party libraries used in logparser. We suggest to keep one parser and delete the others and then re-build the package wheel. This would not break the use of logparser.
• Please enhance logparser with efficiency and scalability with multi-processing, add failure recovery, add persistence to disk or message queue Kafka.
• Drain3 provides a good example for your reference that is built with practical enhancements for production scenarios.

🔥 Citation

If you use our logparser tools or benchmarking results in your publication, please cite the following papers.

• [ICSE'19] Jieming Zhu, Shilin He, Jinyang Liu, Pinjia He, Qi Xie, Zibin Zheng, Michael R. Lyu. Tools and Benchmarks for Automated Log Parsing. International Conference on Software Engineering (ICSE), 2019.
• [DSN'16] Pinjia He, Jieming Zhu, Shilin He, Jian Li, Michael R. Lyu. An Evaluation Study on Log Parsing and Its Use in Log Mining. IEEE/IFIP International Conference on Dependable Systems and Networks (DSN), 2016.

🤗 Contributors

Zhujiem	Pinjia He	LIU, Jinyang	Junjielong Xu	Shilin HE	Joseph
José A. Cordón	Rustam Temirov	Siyu Yu (Youth Yu)	Thomas Ryckeboer	Isuru Boyagane

Discussion

Welcome to join our WeChat group for any question and discussion. Alternatively, you can open an issue here.