As part of the work for JDK-8218998, it was observed that some of the messages of the form "Generating...." are incomplete/confusing.

See this representative sample:
Generating out-PACKAGES-FRAMES-SPLIT/pA/Anno.html...
Generating out-PACKAGES-FRAMES-SPLIT/pA/CA.html...
Generating out-PACKAGES-FRAMES-SPLIT/pA/Ser.html...
Generating out-PACKAGES-FRAMES-SPLIT/pB/CB.html...
Generating out-PACKAGES-FRAMES-SPLIT/overview-frame.html...
Generating out-PACKAGES-FRAMES-SPLIT/pA/package-frame.html...
Generating out-PACKAGES-FRAMES-SPLIT/pA/package-summary.html...
Generating out-PACKAGES-FRAMES-SPLIT/pA/doc-files/extra.html...
Generating extra.html...
Generating out-PACKAGES-FRAMES-SPLIT/pA/package-tree.html...
Generating out-PACKAGES-FRAMES-SPLIT/pB/package-frame.html...
Generating out-PACKAGES-FRAMES-SPLIT/pB/package-summary.html...
Generating out-PACKAGES-FRAMES-SPLIT/pB/package-tree.html...
Generating out-PACKAGES-FRAMES-SPLIT/constant-values.html...
Generating out-PACKAGES-FRAMES-SPLIT/serialized-form.html...
Generating src-html/pA/Anno.html...
Generating src-html/pA/CA.html...
Generating src-html/pA/Ser.html...
Generating src-html/pB/CB.html...
Generating out-PACKAGES-FRAMES-SPLIT/pA/class-use/CA.html...
Generating out-PACKAGES-FRAMES-SPLIT/pA/class-use/Anno.html...
Generating out-PACKAGES-FRAMES-SPLIT/pA/class-use/Ser.html...
Generating out-PACKAGES-FRAMES-SPLIT/pB/class-use/CB.html...
Generating out-PACKAGES-FRAMES-SPLIT/pA/package-use.html...
Generating out-PACKAGES-FRAMES-SPLIT/pB/package-use.html...
Building index for all the packages and classes...
Generating out-PACKAGES-FRAMES-SPLIT/overview-tree.html...
Generating out-PACKAGES-FRAMES-SPLIT/deprecated-list.html...
Building index for all classes...
Generating out-PACKAGES-FRAMES-SPLIT/allclasses-frame.html...
Generating out-PACKAGES-FRAMES-SPLIT/allclasses-frame.html...
Generating out-PACKAGES-FRAMES-SPLIT/index.html...
Generating out-PACKAGES-FRAMES-SPLIT/overview-summary.html...
Generating out-PACKAGES-FRAMES-SPLIT/index-files/index-1.html...
Generating out-PACKAGES-FRAMES-SPLIT/index-files/index-2.html...
Generating out-PACKAGES-FRAMES-SPLIT/index-files/index-3.html...
Generating out-PACKAGES-FRAMES-SPLIT/index-files/index-4.html...
Building index for all classes...
Generating out-PACKAGES-FRAMES-SPLIT/allclasses-index.html...
Generating out-PACKAGES-FRAMES-SPLIT/allpackages-index.html...
Generating out-PACKAGES-FRAMES-SPLIT/help-doc.html...

The files are all generated in reasonable places, but the paths are incomplete for the src-html files and the doc-files. The following is the corresponding directory listing:

out-PACKAGES-FRAMES-SPLIT/src-html/pA/Anno.html
out-PACKAGES-FRAMES-SPLIT/src-html/pA/CA.html
out-PACKAGES-FRAMES-SPLIT/src-html/pA/Ser.html
out-PACKAGES-FRAMES-SPLIT/src-html/pB/CB.html
out-PACKAGES-FRAMES-SPLIT/index.html
out-PACKAGES-FRAMES-SPLIT/deprecated-list.html
out-PACKAGES-FRAMES-SPLIT/allclasses-frame.html
out-PACKAGES-FRAMES-SPLIT/constant-values.html
out-PACKAGES-FRAMES-SPLIT/overview-tree.html
out-PACKAGES-FRAMES-SPLIT/allclasses-index.html
out-PACKAGES-FRAMES-SPLIT/overview-summary.html
out-PACKAGES-FRAMES-SPLIT/overview-frame.html
out-PACKAGES-FRAMES-SPLIT/pA/package-tree.html
out-PACKAGES-FRAMES-SPLIT/pA/package-frame.html
out-PACKAGES-FRAMES-SPLIT/pA/Anno.html
out-PACKAGES-FRAMES-SPLIT/pA/CA.html
out-PACKAGES-FRAMES-SPLIT/pA/Ser.html
out-PACKAGES-FRAMES-SPLIT/pA/package-use.html
out-PACKAGES-FRAMES-SPLIT/pA/class-use/Anno.html
out-PACKAGES-FRAMES-SPLIT/pA/class-use/CA.html
out-PACKAGES-FRAMES-SPLIT/pA/class-use/Ser.html
out-PACKAGES-FRAMES-SPLIT/pA/doc-files/extra.html
out-PACKAGES-FRAMES-SPLIT/pA/package-summary.html
out-PACKAGES-FRAMES-SPLIT/serialized-form.html
out-PACKAGES-FRAMES-SPLIT/help-doc.html
out-PACKAGES-FRAMES-SPLIT/allpackages-index.html
out-PACKAGES-FRAMES-SPLIT/index-files/index-2.html
out-PACKAGES-FRAMES-SPLIT/index-files/index-1.html
out-PACKAGES-FRAMES-SPLIT/index-files/index-3.html
out-PACKAGES-FRAMES-SPLIT/index-files/index-4.html
out-PACKAGES-FRAMES-SPLIT/pB/package-tree.html
out-PACKAGES-FRAMES-SPLIT/pB/package-frame.html
out-PACKAGES-FRAMES-SPLIT/pB/package-use.html
out-PACKAGES-FRAMES-SPLIT/pB/class-use/CB.html
out-PACKAGES-FRAMES-SPLIT/pB/CB.html
out-PACKAGES-FRAMES-SPLIT/pB/package-summary.html

Finally, note it reports 3 times, in variant forms, about "building index for all classes".