[JENKINS-75929] StringIndexOutOfBoundsException on timestamp only line

[jenkins-infra-bot]

There was a line in our console output with timestamp only (and no whitespace after)

[2025-07-23T16:46:19.778Z]

This caused StringIndexOutOfBoundsException

10:22:52  Also:   org.jenkinsci.plugins.workflow.actions.ErrorAction$ErrorId: 0f98af8e-a673-4ce3-a230-58c082ac2516
10:22:52  java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 26
10:22:52       at java.base/jdk.internal.util.Preconditions$1.apply(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions$1.apply(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions$4.apply(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions$4.apply(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions.outOfBounds(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckFromToIndex(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions.checkFromToIndex(Unknown Source)
10:22:52       at java.base/java.lang.String.checkBoundsBeginEnd(Unknown Source)
10:22:52       at java.base/java.lang.String.substring(Unknown Source)
10:22:52       at java.base/java.lang.String.substring(Unknown Source)
10:22:52       at PluginClassLoader for timestamper//hudson.plugins.timestamper.accessor.TimestampLogFileLineAccessor.readLine(TimestampLogFileLineAccessor.java:108)
10:22:52       at PluginClassLoader for timestamper//hudson.plugins.timestamper.action.TimestampsActionOutput$1.readNextLine(TimestampsActionOutput.java:156)
10:22:52       at PluginClassLoader for timestamper//hudson.plugins.timestamper.action.TimestampsActionOutput$1.read(TimestampsActionOutput.java:119)
10:22:52       at java.base/java.io.BufferedReader.fill(Unknown Source)
10:22:52       at java.base/java.io.BufferedReader.implReadLine(Unknown Source)
10:22:52       at java.base/java.io.BufferedReader.readLine(Unknown Source)
10:22:52       at java.base/java.io.BufferedReader.readLine(Unknown Source)
10:22:52       at PluginClassLoader for log-parser//hudson.plugins.logparser.LogParserParser.parseLogBody(LogParserParser.java:366)
10:22:52       at PluginClassLoader for log-parser//hudson.plugins.logparser.LogParserParser.parseLog(LogParserParser.java:161)
10:22:52       at PluginClassLoader for log-parser//hudson.plugins.logparser.LogParserPublisher.perform(LogParserPublisher.java:120)
10:22:52       at jenkins.tasks.SimpleBuildStep.perform(SimpleBuildStep.java:123)
10:22:52       at PluginClassLoader for workflow-basic-steps//org.jenkinsci.plugins.workflow.steps.CoreStep$Execution.run(CoreStep.java:101)
10:22:52       at PluginClassLoader for workflow-basic-steps//org.jenkinsci.plugins.workflow.steps.CoreStep$Execution.run(CoreStep.java:71)
10:22:52       at PluginClassLoader for workflow-step-api//org.jenkinsci.plugins.workflow.steps.SynchronousNonBlockingStepExecution.lambda$start$0(SynchronousNonBlockingStepExecution.java:49)
10:22:52       at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
10:22:52       at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
10:22:52       at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
10:22:52       at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
10:22:52       at java.base/java.lang.Thread.run(Unknown Source)

Code expected string of length 27 or more
https://github.com/jenkinsci/timestamper-plugin/blob/master/src/main/java/hudson/plugins/timestamper/accessor/TimestampLogFileLineAccessor.java#L108

103:            timestamp = GlobalAnnotator.parseTimestamp(logFileLine, build.getStartTimeInMillis())
104:                    .orElse(null);
105:            if (timestamp != null) {
106:                // If we succeeded, then the log file was decorated by GlobalDecorator. Strip the
107:                // timestamp decoration from the front of the line.
108:                logFileLine = logFileLine.substring(27);

---

Originally reported by jenkins8, imported from: StringIndexOutOfBoundsException on timestamp only line

• status: Open
• priority: Minor
• component(s): timestamper-plugin
• resolution: Unresolved
• votes: 0
• watchers: 2
• imported: 20251218-075729

Raw content of original issue

There was a line in our console output with timestamp only (and no whitespace after)

[2025-07-23T16:46:19.778Z]


This caused StringIndexOutOfBoundsException

10:22:52  Also:   org.jenkinsci.plugins.workflow.actions.ErrorAction$ErrorId: 0f98af8e-a673-4ce3-a230-58c082ac2516
10:22:52  java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 26
10:22:52       at java.base/jdk.internal.util.Preconditions$1.apply(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions$1.apply(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions$4.apply(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions$4.apply(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions.outOfBounds(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckFromToIndex(Unknown Source)
10:22:52       at java.base/jdk.internal.util.Preconditions.checkFromToIndex(Unknown Source)
10:22:52       at java.base/java.lang.String.checkBoundsBeginEnd(Unknown Source)
10:22:52       at java.base/java.lang.String.substring(Unknown Source)
10:22:52       at java.base/java.lang.String.substring(Unknown Source)
10:22:52       at PluginClassLoader for timestamper//hudson.plugins.timestamper.accessor.TimestampLogFileLineAccessor.readLine(TimestampLogFileLineAccessor.java:108)
10:22:52       at PluginClassLoader for timestamper//hudson.plugins.timestamper.action.TimestampsActionOutput$1.readNextLine(TimestampsActionOutput.java:156)
10:22:52       at PluginClassLoader for timestamper//hudson.plugins.timestamper.action.TimestampsActionOutput$1.read(TimestampsActionOutput.java:119)
10:22:52       at java.base/java.io.BufferedReader.fill(Unknown Source)
10:22:52       at java.base/java.io.BufferedReader.implReadLine(Unknown Source)
10:22:52       at java.base/java.io.BufferedReader.readLine(Unknown Source)
10:22:52       at java.base/java.io.BufferedReader.readLine(Unknown Source)
10:22:52       at PluginClassLoader for log-parser//hudson.plugins.logparser.LogParserParser.parseLogBody(LogParserParser.java:366)
10:22:52       at PluginClassLoader for log-parser//hudson.plugins.logparser.LogParserParser.parseLog(LogParserParser.java:161)
10:22:52       at PluginClassLoader for log-parser//hudson.plugins.logparser.LogParserPublisher.perform(LogParserPublisher.java:120)
10:22:52       at jenkins.tasks.SimpleBuildStep.perform(SimpleBuildStep.java:123)
10:22:52       at PluginClassLoader for workflow-basic-steps//org.jenkinsci.plugins.workflow.steps.CoreStep$Execution.run(CoreStep.java:101)
10:22:52       at PluginClassLoader for workflow-basic-steps//org.jenkinsci.plugins.workflow.steps.CoreStep$Execution.run(CoreStep.java:71)
10:22:52       at PluginClassLoader for workflow-step-api//org.jenkinsci.plugins.workflow.steps.SynchronousNonBlockingStepExecution.lambda$start$0(SynchronousNonBlockingStepExecution.java:49)
10:22:52       at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
10:22:52       at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
10:22:52       at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
10:22:52       at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
10:22:52       at java.base/java.lang.Thread.run(Unknown Source)


Code expected string of length 27 or more
https://github.com/jenkinsci/timestamper-plugin/blob/master/src/main/java/hudson/plugins/timestamper/accessor/TimestampLogFileLineAccessor.java#L108

103:            timestamp = GlobalAnnotator.parseTimestamp(logFileLine, build.getStartTimeInMillis())
104:                    .orElse(null);
105:            if (timestamp != null) {
106:                // If we succeeded, then the log file was decorated by GlobalDecorator. Strip the
107:                // timestamp decoration from the front of the line.
108:                logFileLine = logFileLine.substring(27);

• environment: timestamper 1.30

[jenkins-infra-bot]

markewaite:

• Original comment link
• Raw content of original comment:

  Please provide enough details so that others can duplicate the issue from a fresh Jenkins installation.  How to report an issue provides a checklist of the information needed.
  
  I was unable to duplicate it with the Pipeline:
  
  
  pipeline {
      agent any
      options {
          timestamps()
      }
      stages {
          stage('Hello') {
              steps {
                  echo ''
                  echo 'Hello World'
                  echo ''
              }
          }
      }
  }
  
  
  
  

Please provide enough details so that others can duplicate the issue from a fresh Jenkins installation. How to report an issue provides a checklist of the information needed.

I was unable to duplicate it with the Pipeline:

pipeline {
    agent any
    options {
timestamps()
    }
    stages {
stage('Hello') {
    steps {
echo ''
echo 'Hello World'
echo ''
    }
}
    }
}

[jenkins-infra-bot]

jenkins8:

• Original comment link
• Raw content of original comment:

  We do not know how to reproduce either but the line with timestamp only (and no whitespace after) can occur.
  
  Is it really necessary to figure out how to reproduce when the fix can be as simple as catching StringIndexOutOfBoundsException and ignore the line?
  
  try {
      logFileLine = logFileLine.substring(27);
  } catch (StringIndexOutOfBoundsException e) {
      ...
  }
  
  
  

We do not know how to reproduce either but the line with timestamp only (and no whitespace after) can occur.

Is it really necessary to figure out how to reproduce when the fix can be as simple as catching StringIndexOutOfBoundsException and ignore the line?

try {
    logFileLine = logFileLine.substring(27);
} catch (StringIndexOutOfBoundsException e) {
    ...
}

[Sonaliparte]

Hello, I would like to work on this issue and submit a fix.
Can I be assigned?