Solaris 10 Bash 将输出重定向到错误顺序的文件

Question

我执行命令：

groovy -cp SCRIPTS_DIR SCRIPTS_DIR/build.groovy >>output.txt 2>>error.txt

build.groovy 文件包含 svn 命令和很多mvn 命令。在执行期间，文件 output.txt 正在更改顺序，并且一些行会添加到输出的中间而不是末尾。

output.txt 示例：

Executing: svn export --revision 108 --force https://svn.server.eu:/svn/TEST/trunk 101
A    /opt/eu/building/jenkins/workspace/test/101
A    /opt/eu/building/jenkins/workspace/test/101/src
A    /opt/eu/building/jenkins/workspace/test/101/src/scripts
A    /opt/eu/building/jenkins/workspace/test/101/src/template
A    /opt/eu/building/jenkins/workspace/test/101/src/template/tools
A    /opt/eu/building/jenkins/workspace/test/101/MVN
A    /opt/eu/building/jenkins/workspace/test/101/MVN/src
A    /opt/eu/building/jenkins/workspace/test/101/MVN/src/main
A    /opt/eu/building/jenkins/workspace/test/101/MVN/src/main/assembly
A    /opt/eu/building/jenkins/workspace/test/101/common
A    /opt/eu/building/jenkins/workspace/test/101/common/py
A    /opt/eu/building/jenkins/workspace/test/101/PLAIN
A    /opt/eu/building/jenkins/workspace/test/101/PLAIN/scripts

执行 mvn 命令几秒后，一些日志位于与 svn export 命令相关的行之间：

Executing: svn export --revision 108 --force https://svn.server.eu:/svn/TEST/trunk 101
********************************************************************************
*** Check if root POM exists ***************************************************
********************************************************************************
*** Timestamp....................................: 30.03.2022 14:57:53
*** In minute since build start..................: 1
*** Root POM exists: MVN/pom.xml
********************************************************************************
*** Creating source.zip on Software Archive ************************************
********************************************************************************
*** Timestamp....................................: 30.03.2022 14:57:53
*** In minute since build start..................: 1
      [zip] Building zip: /opt/eu/building/jenkins/workspace/test/source101.zip
********************************************************************************
*** Running resolve-props and lock-snapshots ***********************************
********************************************************************************
A    /opt/eu/building/jenkins/workspace/test/101
A    /opt/eu/building/jenkins/workspace/test/101/src
A    /opt/eu/building/jenkins/workspace/test/101/src/scripts
A    /opt/eu/building/jenkins/workspace/test/101/src/template
A    /opt/eu/building/jenkins/workspace/test/101/src/template/tools
A    /opt/eu/building/jenkins/workspace/test/101/MVN
A    /opt/eu/building/jenkins/workspace/test/101/MVN/src
A    /opt/eu/building/jenkins/workspace/test/101/MVN/src/main
A    /opt/eu/building/jenkins/workspace/test/101/MVN/src/main/assembly
A    /opt/eu/building/jenkins/workspace/test/101/common
A    /opt/eu/building/jenkins/workspace/test/101/common/py
A    /opt/eu/building/jenkins/workspace/test/101/PLAIN
A    /opt/eu/building/jenkins/workspace/test/101/PLAIN/scripts

我在不同的 Linux 系统上执行此命令，output.txt 是正确的。仅在 Solaris 10 上我有这种“奇怪”的标准输出行为。也许它与输出缓冲有关，但我不确定。 有什么解决办法吗？