CentOS7执行yum升级后启动R3 Corda demobench节点触发std::bad_cast及core dump求助

Hey Rob, sorry to hear you're stuck with this frustrating error after updating your CentOS 7 system—this is almost certainly a compatibility clash between the upgraded system libraries and Corda Demobench's underlying binaries. Let's walk through some practical steps to get your nodes running again:

• Check and revert to a compatible Java version
  Most public Corda Demobench releases rely specifically on OpenJDK 8. A yum upgrade might have bumped your Java to a newer, incompatible version. First, confirm your current Java setup with:

  java -version
  

  If it's not OpenJDK 8, use CentOS's alternatives system to switch back:

  sudo alternatives --config java
  

  Select the OpenJDK 8 option from the list, restart Demobench, and try launching the node again.

• Reinstall Demobench and verify system C++ libraries
  The std::bad_cast error points to a C++ type mismatch, which often happens when libraries like libstdc++ get updated to a version Demobench doesn't support. Uninstall your current Demobench instance, then download the latest CentOS 7-specific release. Before reinstalling, check your libstdc++ version:

  rpm -q libstdc++
  

  If the version is newer than what Demobench expects, you may need to install a compatible older version (note: be cautious with downgrading system libraries—only do this if you're sure it won't break other apps on your system).

• Clear cached node data and start fresh
  Old node configurations or cached files from pre-upgrade might conflict with the new system environment. Stop Demobench completely, then delete the node data directory (usually located at ~/.corda/demobench or within your Demobench installation's nodes folder). Launch Demobench again and create a brand-new node—this eliminates any leftover incompatibilities from your previous setup.

• Double-check system environment variables
  Make sure the yum upgrade didn't alter critical environment variables. Verify that JAVA_HOME points to your OpenJDK 8 installation:

  echo $JAVA_HOME
  

  If it's set incorrectly, update it in your ~/.bashrc or /etc/profile file, source the file with source ~/.bashrc, and restart your terminal before running Demobench.

内容的提问来源于stack exchange，提问作者Rob Morton