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### What changes were proposed in this pull request? 1. Add a new sink and allow the user to store metrics to files. 2. Celeborn will scrape its metrics periodically to make sure that the metric data won't be too large to cause OOM. ### Why are the changes needed? A long-running worker ran out of memory and found out that the metrics are huge in the heap dump. As you can see below, the biggest object is the time metric queue, and I got 1.6 million records. <img width="1516" alt="Screenshot 2025-06-24 at 09 59 30" src="https://github.com/user-attachments/assets/691c7bc2-b974-4cc0-8d5a-bf626ab903c0" /> <img width="1239" alt="Screenshot 2025-06-24 at 14 45 10" src="https://github.com/user-attachments/assets/ebdf5a4d-c941-4f1e-911f-647aa156b37a" /> ### Does this PR introduce _any_ user-facing change? NO. ### How was this patch tested? Cluster. Closes #3346 from FMX/b2045. Lead-authored-by: mingji <fengmingxiao.fmx@alibaba-inc.com> Co-authored-by: Ethan Feng <ethanfeng@apache.org> Co-authored-by: Fei Wang <fwang12@ebay.com> Signed-off-by: Wang, Fei <fwang12@ebay.com>
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21 lines
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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*.sink.prometheusServlet.class=org.apache.celeborn.common.metrics.sink.PrometheusServlet
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*.sink.jsonServlet.class=org.apache.celeborn.common.metrics.sink.JsonServlet
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*.sink.loggerSink.class=org.apache.celeborn.common.metrics.sink.LoggerSink
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