The type java.io.ObjectInputStream cannot be resol

Question

I have downloaded Eclipse and tried to create a sample servlet program but I got following error

The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files

I have configured build path correctly. I am using Java 8 and Apache Tomcat 7 and libraries for both are referenced correctly.

Problem is specifically for Java EE only. Ordinarily Java SE projects are running fine.

Answer 1

Using the latest 7.x Tomcat (currently 7.0.69) solved the problem for me.

We did also try a workaround in a old eclipse bug, maybe that did it's part to solve the problem, too?

https://bugs.eclipse.org/bugs/show_bug.cgi?id=67414

Workaround:

• Window->Preferences->Java->Installed JREs
• Uncheck selected JRE
• Click OK (this step may be optional?)
• Check JRE again

Answer 2

Something happened in Java 8 Update 91 that broke existing JSP code. That seems pretty clear. Here is a sample of similar questions and bug reports:

• Unable to compile JSP file with JDK1.8.0_92
• Spring MVC - Unable to compile class for JSP
• Unable to access CloudPlatform Client
• https://bugs.openjdk.java.net/browse/JDK-8155588 (closed as "not an issue")
• https://bugs.openjdk.java.net/browse/JDK-8155223 (closed as "not an issue")
• https://access.redhat.com/solutions/2294701
• https://alluxio.atlassian.net/browse/ALLUXIO-1956
• https://jira.atlassian.com/browse/CWD-4729
• https://community.exoplatform.com/portal/intranet/forum/topic/topic991e097d9e45345236bb2bd1920a4c68
• https://issues.apache.org/jira/browse/OOZIE-2533 (from a comment: "This is really looking like a JDK bug")
• https://bugzilla.redhat.com/show_bug.cgi?id=1337940 (comment 2 mentions the change to java.io.ObjectInputStream in Update 91 that "made it incompatible with RHEL6's current ECJ version")
• https://github.com/mit-cml/appinventor-sources/issues/814
• https://community.oracle.com/thread/3953395

All these are about problems with Java 8 Update 91 (or later) that are not present when using earlier JRE/JDK versions.

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The following OpenJDK changeset from 22 January 2016 appears to be related: http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/32f64c19b5fb (commit message "8144430: Improve JMX connections"). The changeset seems to be related to this vulnerability, https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-3427, which is mentioned in a comment to this Red Hat bug report, https://bugzilla.redhat.com/show_bug.cgi?id=1336481.

The Update 91 release notes document mentions JDK-8144430 (non-public ticket): http://www.oracle.com/technetwork/java/javase/8u91-relnotes-2949462.html.

In "Oracle Critical Patch Update Advisory - April 2016", the CVE-2016-3427 vulnerability is mentioned: http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html.

Answer 3

I was also facing same issue. I had Jdk1.7.0.79. Then I updated it with Jdk8.0.120. Then the problem solved. After successful completion of upgraded jdk. Go to project->clean. It will rebuild the project and all red alert will be eliminated.

Answer 4

Okay, this question was a year ago but I recently got this problem as well.

So what I did :

1. Update tomcat 7 to tomcat 8.
2. Update to the latest java (java 1.8.0_141).
3. Update the JRE System Library in Project > Properties > Java Build Path. Make sure it has the latest version which in my case is jre1.8.0_141 (before it was the previous version jre1.8.0_111)

When I did the first two steps it still doesn't remove the error so the last step is important. It didn't automatically change the build path for jre.

Answer 5

I am using Google appengine java sdk and was facing similar issue. I had to add

<runtime>java8</runtime>

in appengine-web.xml file to make it work.

Answer 6

Workaround:

Window -> Preferences -> Java -> Installed JREs, select a different JRE

maybe this JDK edition is not suitable:

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So try this one instead:

Problem solved!