{"id":56373,"library":"blockhound","title":"BlockHound","description":"Java agent to detect blocking calls from non-blocking threads, helping to identify code that violates reactive programming principles.","status":"active","version":"1.0.17.RELEASE","language":"java","source_language":null,"source_url":"https://github.com/reactor/BlockHound","tags":["reactive","blocking","detection","agent","java"],"install":[{"cmd":"<dependency>\n  <groupId>io.projectreactor.tools</groupId>\n  <artifactId>blockhound</artifactId>\n  <version>1.0.17.RELEASE</version>\n</dependency>","lang":"xml","label":"Maven"},{"cmd":"implementation 'io.projectreactor.tools:blockhound:1.0.17.RELEASE'","lang":"groovy","label":"Gradle"}],"dependencies":[],"imports":[{"symbol":"BlockHound","correct":"reactor.blockhound.BlockHound"}],"quickstart":{"code":"import reactor.blockhound.BlockHound;\n\nBlockHound.install();\n// Now any blocking call on a non-blocking thread will throw an error.","lang":"java","description":"Install BlockHound to detect blocking calls."},"warnings":[{"fix":"Use BlockHound.Builder to whitelist specific methods or classes.","message":"BlockHound may produce false positives with some libraries that use blocking internally but are safe in reactive contexts.","severity":"gotcha","affected_versions":"*"}],"env_vars":null,"search_vec":"'agent':3,25 'block':6,11,23 'blockhound':1 'call':7 'code':16 'detect':5,24 'help':13 'identifi':15 'java':2,26 'non':10 'non-block':9 'principl':21 'program':20 'reactiv':19,22 'thread':12 'violat':18","created_at":"2026-06-15T10:34:05.204438+00:00","updated_at":"2026-06-15T10:34:05.204438+00:00","problems":[],"ecosystem":"maven","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":null,"cli_version":null,"type":"library","homepage":"https://github.com/reactor/BlockHound","github":"https://github.com/reactor/BlockHound","docs":"https://appdoc.app/artifact/io.projectreactor.tools/blockhound/","changelog":null,"pypi":null,"npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["observability"],"base_url":null,"auth_type":null,"provenance":{"verified_status":null,"verified_at":null,"last_verified":"2026-06-15","next_check":"2026-12-12","install_tag":null}}