A user with some *-output.txt files pushing 70Mb received errors when publishing test results:
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Java heap space
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:2882)
at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100)
at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:515)
at java.lang.StringBuffer.append(StringBuffer.java:306)
at java.io.StringWriter.write(StringWriter.java:77)
at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1129)
at org.apache.commons.io.IOUtils.copy(IOUtils.java:1104)
at org.apache.commons.io.IOUtils.copy(IOUtils.java:1050)
at org.apache.commons.io.IOUtils.copy(IOUtils.java:1075)
at org.apache.commons.io.IOUtils.toString(IOUtils.java:382)
at org.apache.commons.io.FileUtils.readFileToString(FileUtils.java:1103)
at org.apache.commons.io.FileUtils.readFileToString(FileUtils.java:1120)
at hudson.tasks.junit.SuiteResult.<init>(SuiteResult.java:195)
at hudson.tasks.junit.SuiteResult.parseSuite(SuiteResult.java:130)
at hudson.tasks.junit.SuiteResult.parse(SuiteResult.java:115)
at hudson.tasks.junit.TestResult.parse(TestResult.java:227)
at hudson.tasks.junit.TestResult.parse(TestResult.java:163)
at hudson.maven.reporters.SurefireArchiver.postExecute(SurefireArchiver.java:141)
at hudson.maven.Maven2Builder.postExecute(Maven2Builder.java:155)
at hudson.maven.MavenBuilder$Adapter.postExecute(MavenBuilder.java:310)
at hudson.maven.agent.PluginManagerInterceptor$1MojoIntercepterImpl.callPost(PluginManagerInterceptor.java:170)
at hudson.maven.agent.PluginManagerInterceptor.executeMojo(PluginManagerInterceptor.java:183)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
at org.apache.maven.lifecycle.LifecycleExecutorInterceptor.execute(LifecycleExecutorInterceptor.java:65)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
[INFO] ------------------------------------------------------------------------
[INFO] ...
[INFO] Final Memory: 223M/1224M
[INFO] ------------------------------------------------------------------------
Indeed it is silly to call FileUtils.readFileToString only to throw away the great majority of what was just read.