Github user mattf-horton commented on a diff in the pull request: https://github.com/apache/incubator-metron/pull/451#discussion_r101203282 --- Diff: metron-platform/metron-parsers/src/main/java/org/apache/metron/parsers/utils/DateUtils.java --- @@ -0,0 +1,78 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.metron.parsers.utils; + +import java.text.ParseException; +import java.text.SimpleDateFormat; +import java.util.ArrayList; +import java.util.Date; +import java.util.List; + +/** + * Various utilities for parsing and extracting dates + * + */ +public class DateUtils { + + public static List<SimpleDateFormat> DATE_FORMATS_CEF = new ArrayList<SimpleDateFormat>() { + { + // as per CEF Spec + add(new SimpleDateFormat("MMM dd HH:mm:ss.SSS zzz")); + add(new SimpleDateFormat("MMM dd HH:mm:ss.SSS")); --- End diff -- Systems that don't specify time zone are often time zone naive, meaning they use local time settings. That may be a better guess than UTC, altho it only works correctly when the source and the collector app are in the same zone. I've seen some apps provide a per-source time zone setting to improve this.
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