{"record":{"id":"75c6eafeb9d4336a","repo":"flowable/flowable-engine","slug":"task-namelike-is-null-75c6ea","errorCode":null,"errorMessage":"Task namelike is null","messagePattern":"Task namelike is null","errorType":"exception","errorClass":"ActivitiIllegalArgumentException","httpStatus":null,"severity":"error","filePath":"modules/flowable5-engine/src/main/java/org/activiti/engine/impl/TaskQueryImpl.java","lineNumber":232,"sourceCode":"\n        final int nameListSize = nameList.size();\n        final List<String> caseIgnoredNameList = new ArrayList<>(nameListSize);\n        for (String name : nameList) {\n            caseIgnoredNameList.add(name.toLowerCase());\n        }\n\n        if (orActive) {\n            this.currentOrQueryObject.nameListIgnoreCase = caseIgnoredNameList;\n        } else {\n            this.nameListIgnoreCase = caseIgnoredNameList;\n        }\n        return this;\n    }\n\n    @Override\n    public TaskQueryImpl taskNameLike(String nameLike) {\n        if (nameLike == null) {\n            throw new ActivitiIllegalArgumentException(\"Task namelike is null\");\n        }\n\n        if (orActive) {\n            currentOrQueryObject.nameLike = nameLike;\n        } else {\n            this.nameLike = nameLike;\n        }\n        return this;\n    }\n\n    @Override\n    public TaskQuery taskNameLikeIgnoreCase(String nameLikeIgnoreCase) {\n        if (nameLikeIgnoreCase == null) {\n            throw new ActivitiIllegalArgumentException(\"Task nameLikeIgnoreCase is null\");\n        }\n\n        if (orActive) {\n            currentOrQueryObject.nameLikeIgnoreCase = nameLikeIgnoreCase.toLowerCase();","sourceCodeStart":214,"sourceCodeEnd":250,"githubUrl":"https://github.com/flowable/flowable-engine/blob/d6d39ce1c69ff244f2d9dc6af756a9b95e865586/modules/flowable5-engine/src/main/java/org/activiti/engine/impl/TaskQueryImpl.java#L214-L250","documentation":"Fluent-setter validation in flowable5 TaskQueryImpl.taskNameLike: a null LIKE pattern was passed to the task-name filter and rejected as caller error.","triggerScenarios":"Calling taskNameLike(null), typically when the value comes from a variable/optional field that was never initialized.","commonSituations":"Binding a search-form field straight into taskNameLike without checking presence; a Map/DTO lookup that returns null for an absent key; Optional handled with orElse(null).","solutions":["Guard the call: only invoke taskNameLike when the value is non-null","Use a null-safe default such as a wildcard only when a pattern is genuinely provided","Let the query builder be conditional: if (pattern != null) query.taskNameLike(pattern);"],"exampleFix":"// before\nString nameLike = params.get(\"nameLike\");\nquery.taskNameLike(nameLike);\n// after\nString nameLike = params.get(\"nameLike\");\nif (nameLike != null) {\n    query.taskNameLike(nameLike);\n}","handlingStrategy":"type-guard","validationCode":"Objects.requireNonNull(nameLike, \"taskNameLike pattern must not be null\"); // or skip the call entirely","typeGuard":"void addNameLikeFilter(TaskQuery query, String nameLike) {\n    if (nameLike != null) {\n        query.taskNameLike(nameLike);\n    }\n}","tryCatchPattern":"try {\n    query.taskNameLike(pattern);\n} catch (org.activiti.engine.ActivitiIllegalArgumentException e) {\n    // pattern was null: apply no name filter or return 400\n}","preventionTips":["Treat all optional query criteria as nullable and guard each call","Convert empty/absent inputs to 'no filter' at the API boundary","Prefer Optional over null for optional search fields"],"tags":["activiti","task-query","null-argument","validation"],"backgroundTag":"null-argument","analyzedSha":"d6d39ce1c69ff244f2d9dc6af756a9b95e865586","analyzedAt":"2026-09-11T06:41:19.413Z","contentChangedAt":"2026-09-11T06:41:19.413Z","schemaVersion":2},"datasetVersion":"2026-09-18T16:30:33.424Z"}